1) I rarely use podfarm and lots of model packs as I have the version that needs my Kidney Bean connected to the computer for them to work.  As I now pick up my laptop and move to other parts of the house, I do not like my guitar effects turning off.
 
2) I use GR5 mostly, it has some very wild sounds and processing to it that I have been using quite a bit lately.  
 
I keep hearing that TH2 full has a very good straight rocking AMP sound and is worth it.....and I am thinking since it does not need a dongle, it would be a good 2nd guitar SIM to have.
 
What think you all....79 is tempting.

Personally I don't like TH2, but that's just me. GR5 is my go to and I have a couple demo sims that work. Usually you get the basic rock amp in the stripped down or free versions and pay more for all the bells and whistles. If you use the version included in Sonar and love it, then buy the full package. If you think the full package will be way better then you could be disappointed.

I use Pod Farm 2, GR4, Amplitube3 and Scuffham S-Gear.
TH2 sounds good but Scuffham is my go to for guitar. I use all for various non-guitar effects when needed.
Try before you buy....
Try out Scuffham S-Gear for the same price...

It's all Ice Cream flavors...

They all do something that the others don't...but they all
do basically the same thing.  It's a matter of personal preference...

I'm a guitarist and I have A3, AmpLion Pro, G5, Kuassa Amplifikation, TH2, blah blah blah...

The most pleasing to my ear was Scuffman.  Still don't have that one (yet).
 
It's never a case of "do I need" as now, most DAW's come with an Amp Sim...
it's a question of CAN AND WILL I USE IT.  

The key word is DEMO.  Try before you buy.

You won't miss it if you don't buy it but I kinda buy them all - when cheap. If it's not breaking the bank then why not? I quite like the cleans but they all need some work which is generally the problem when it comes to guitar Vst.
 
The money would either go on your partner or kids or both and that's just like burning it.
 
I think you can sell their stuff once (obviously you would need to check their current policy) if you don't like it.
 
Scuffham sounds great but is limited, as you would spot if you look into it. It does sound nice though.

thanks all, I will play with some demos.
 
JR

I have GR5, Podfarm Platinum, Scuffham and Revalver SE.  My go to has usually been GR5 but I purchased TH3 last night and am really surprised at how good it sounds.  It has a "bigger", "fuller" sound using just the basic amps to my ear.  I downloaded the demo and after going through all the presets I bought it.  The Randalls and Brunettis really blew me away.  TH2 looks like my new go to. 

I use GR5, Amplitube, ReValver, and TH2 Full version. I have gravitated more towards TH2 since getting the full version. It is very versatile for my uses. Everyone has their own cup of tea. TH2 has filled the bill time and time again while the others couldn't.

ccLarry said it best:
They all do something that the others don't...but they all
do basically the same thing.  It's a matter of personal preference...
 
Another thing to consider is the kind of music you are playing. That might color your decision.
 
I tend to like to start with good presets and that's why Scuffham gets more play than the others and also why Amplitube gets the least. Scuffham presets are like guitar tone lessons. Same for GR4. There are some great techniques to be gleaned from their setups.
 
To be honest I like all of the ones I own I just gravitate to a few for ease of use and what I am playing.
 
All of these programs also can double as effects plugins for non-guitar use. I find myself using Auto Pan from GR quite a bit or some delays and reverbs.

I use GR5, TH2 (full version) and PodFarm. I like them all for different reasons. PodFarm is my goth for at least getting started on a piece. I also use a laptop. In my case I have a Line 6 KB37 which I'm very happy to carry with me from room to room if I'm not in my main studio area with full keyboards. Even though the KB37 is also an audio interface, I use a Focusrite Scarlett for my audio interface. It's all very portable and powerful.

But I really like PodFarm. Very natural sounding like recording a real amp.