promidi
What audio issues were you having with Sonar Professional and Cakewalk by Bandlab installed?  You can use Session Drummer 3 in Cakewalk by Bandlab.

I had just installed SONAR Pro and Cakewalk on my new computer and I was having serious audio latency issues, clicks, pops and drop outs.  I went through all of the typical settings and adjustments, so I uninstalled both programs and reinstalled just Cakewalk and for now it seams to working fine. 
 
 
 

JonD
Before you spend any money on a drum vsti, I strongly recommend you try MT Power Drumkit 2, which is FREE:
 
https://www.powerdrumkit.com/
 
https://www.youtube.com/watch?v=5B7wHrQGfjA
 

Thanks for the tip on this VST.  I'm still going to have to spend money because if the MT Power Drum Kit 2 works like I want it to and I think it will, I am going to have to donate to it.  It looks freakin awesome!
 
Liquid Noise

You can re-install Session Drummer without Sonar.

PopStarWannabe

Liquid Noise
I do wish that BandLab kept Session Drummer 3.  I don't like the old version that they kept...

What do you mean by that? Who kept what? You're saying BandLab didn't keep but then you're saying they kept "an old version" ???
 

 
This also baffles me? I have Session drummer 3 when I open CbB? 
Are you saying CbB comes with Session drummer 2 ??  
 
And if you had Sonar Professional you would have AD2 with just 1 Add Pak. 
I first bought Pro and later upgraded to Plat, so I ended up with 3 Add paks :) 
 
I do agree that SD 3 rules as a sample player but that's all I'll use it for. It sounds kind of flat compared to AD2 or Air Strike2. 
I can hear the difference every time I open an older project that still has SD3. 
 
 I have my own snare, brush and weird percussion samples I use SD3 to play, but the rest of my kit is always AD2. It's ability to process from within the GUI is why I get my best drums sounds there. 
 
One needs to find a drum sound that works best for your style of music and then move on and make music. It gets tedious moving different kits in and out of the studio!   It took me 15 years but I now have it pretty close to what I want to hear. 
Only thing I dislike is I can only run AD2 on 2 Computers. I wished it used a dongle. 

Cactus Music
 
And if you had Sonar Professional you would have AD2 with just 1 Add Pak. 
I first bought Pro and later upgraded to Plat, so I ended up with 3 Add paks :) 
 

Good catch there Johnny!  The OP can just sign in to his XLN account and download AD2 directly to his new computer using the XLN Online installer.  No Sonar required!  All Cakewalk ever gave us was a registration code for the standalone AD2, so if it was ever registered with XLN, good to go.  Else lookup the code on the Cakewalk account, and then register with XLN. https://www.cakewalk.com/My-Account

JonD
Before you spend any money on a drum vsti, I strongly recommend you try MT Power Drumkit 2, which is FREE:
 
https://www.powerdrumkit.com/
 
https://www.youtube.com/watch?v=5B7wHrQGfjA
 

And I will +1 the free MT Power Drum Kit as well!  I have tried it and the free version would be a great starter kit for the price.

fresh101
You can re-install Session Drummer without Sonar.

That should work if you select just that the plugin from the advanced install menu, and not the Sonar program or anything else.

I use Plogue sforzando and just assemble my own kits over a normal keyboard.
 
SessionDrummer had some horrible bugs due to incomplete support for the sfz standard.
If you get into sfz commands with it, it could hang your PC requiring a reboot.

PopStarWannabe

Liquid Noise
I do wish that BandLab kept Session Drummer 3.  I don't like the old version that they kept...

What do you mean by that? Who kept what? You're saying BandLab didn't keep but then you're saying they kept "an old version" ???
 

The Drum kit I am talking about is the SI Drum Kit. I did forget about the Addictive Drums 2 Kit but I really did not care for that one too much. Although I might try it again, but I am still trying others out.

PopStarWannabe

Liquid Noise
I do wish that BandLab kept Session Drummer 3.  I don't like the old version that they kept...

What do you mean by that? Who kept what? You're saying BandLab didn't keep but then you're saying they kept "an old version" ???
 

Possibly a misunderstanding? SD 1 was just called Session Drummer. SD 2 was called Session Drummer 2 and SD 3 was also called Session Drummer. A cause for confusion.

I haven't read through the entire posts in this thread so this might have already been mentioned? Drummix by Bluenoise plugins. It cannot be beaten for its price point. I have SD2, EzDrummer2, ADD2, etc... and it really compares well to all the above. http://www.bluenoiseplugins.com/plugins/drummix/