Exactly.

You've got a few things working against you here. Your system is a little underpowered but with some system tweaks, using the track freeze function and increasing your latency when not tracking you should be able to get X2 working a little better.
 
Next you are using third party plugs which can be problematic even on the best of systems. Contact Cake to see if there are any known issues with the plugins you are using and if they have any solutions for you.
 
Third you are using 32 bit plugs on 64 bit OS and Sonar install which again can be problematic at the best of times. You have already discovered Jbridge but that still isn't as good as just using a 64 bit plug. Go to all the websites for the plugs you use and see if they have 64 bit versions. Many will have them offered free to existing users. Ones that don't and aren't cooperate then either find a suitable 64 bit alternative or switch to X1, apply the effect then render the track and import it back into the X2 project.
 
There is also the issue that has already been brought up. You are seriously lacking in RAM and your 64 bit OS and Sonar install is pointless with under 4GB. If you can get another 6GB of RAM onto your system you should do it (probably best to buy 8GB of the same kind instead of trying to match up to your existing RAM... RAM is not very expensive). If you can afford new RAM or there is something preventing from installing some and you still want to use your 32bit plugs you might as well switch to Win7 32 bit if you already have it or Win 32. However I'm not sure if that would mean you'd have to buy another copy of windows. If so that's a pretty expensive solution just to use some old plugs. I'm not sure whether Win8 is more resource intensive either but you may want to look into that because between that and Sonar it may be sinking your system and 7 may work better... but I really don't know. Also your sig says you are on on the Prerelease version of Win8. If that is the case they have done a lot of patches. You should probably get the most up to date version of whatever OS you are using.
 
X2 has it's problems but you should be able to get it to work without crashing all the time on your system if you are smart about it. It's worth it even if you have to go back to X1 to perform specific tasks every now and again.

Beep see you are very valuable here. No one could have done a better job.  

Well that is true, but of course i have plugins that i use mostly is 64 bit plugins
there's just a few plugins that is 32 bit.
I see no reason to install Sonar as 32 bit ? and install all the others as 32bit !

Anyway the problem is Bitbridge itself, and the solution to that is just using JBridge.

other than that Sonar is working great.

Yes and yes... i may have to get some more memory for my computer.

Soundblend
Good question, i guess it has to do with the " taste " how they sound and compress !

As you know i now have X1d, and there's not exactly a huge amount of effect plugins there.
there is the Sonitius suite, it's ok but nothing more.

Now i am not after a huge collection of plugins, ill rather have a few good ones that i really know. 

Guess we all have some picture of what kind, of sound we are looking for
and hence what plugins we choose to use.

if i had the money i would probably get this but it's to expensive for me.

Yes Sonar Producer, have a lot of great plugins / channel strip etc, and now also melodyne.
maybe later when i can earn some money of recording and mixing
i would be able to upgrade to X3, with all the goodies there !

Now for me at present time, it's just a dream but who knows, time may change.
 

No sir the Sonitius suite is a great collection of very high quality plugins. Those that dismiss them generally don't have a clue about good plugins.  Plus you have X2 and what it comes with. 

There is no advantage to using 64bit plug-ins in 2GB of RAM either. The 32bit versions would run just as well, if not better. As has been suggested, the hardware, OS and DAW are a bad match. The least cost solution to the best configuration given the available hardware/OS would be to run everything 32bit.

John
Beep see you are very valuable here. No one could have done a better job.  

I just regurgitate what I've learned here. It's all ya'll that deserve the credit when I make the occasional correct observation. ;-)

You kill me Beep! 

Tis the truth. Without guys like yourself and our good friend scook here I'd be in a corner somewhere covered in my own waste mumbling to myself.

Discussing plugins is good , but will not always come to a solution for everyone.
One person may like waves plugins, another would not..

You say that :
Those who dismiss them generally don't have a clue about good plugins !

I do not agree there, it all comes to the taste and how you hear the sound is processed
and what you are able to listen for.
Also the knowledge how to use em, and what to adjust to get a better result.
If you don't know how to use an EQ, and what to listen for, any EQ would do anyway.
the same goes for Compressors etc.