Thanks guys. I will check into NadIR. There was no documentation on the website that I could see but I didn't download it yet and maybe it's in the zip file.
It looks like Perfect Space is no longer bundled with SONAR.
I did import some of the Ownhammer and RedWirez demo IR's into both REMatrix and TH2 and WOW it is ever a pain to navigate the IR's file structure. There is no easy way to import the folders as far as I can tell and so you have to navigate to each folder, import, and then wade through all of the IR's in the plug-in's interface instead of just the simplicity of browsing the file system directly... unless I am missing something which could very well be true - I'm new to the software DAW world after being used to 15+ years on my VS2480 and I'm still learning at least a couple of new things ever day about everything SONAR has to offer.
Also, the IR's in REMatrix didn't sound right. I haven't tweaked any of the settings yet, but they just sounded like reverb effects and not at all like a miced cabinet when set to 100% wet - which is where I assume it needs to be since any setting below that obviously has the ugly raw unprocessed guitar sound in the mix. I probably have to set all of the time parameters to zero. I didn't have a ton of time to mess with it when I tried it for the first time. The REMatrix Solo that comes with SONAR also only lets me apply one IR so no mixing different mic types, which is something I do when I mic a cabinet (I go with a ribbon and an SM57 or condenser and mix the two together.) To get around that I'd have to duplicate the track, do another Pro Channel REMatrix and mix the two tracks - doable but a pain.
Now TH2 I had much better results with. I can apply two IR's and adjust the balance between the two and the processed track doesn't sound like a reverb effect. It's just the navigation of the IR files that is a pain. For the simple fact that I can mix two mics (or even two speaker cabinets for that matter) directly in TH2 is the better option between the two. But navigating the IR files... PITA.
Deciding on a reactive load/dummy load box is my next hurdle. I think I've narrowed it down to the Suhr Reactive Load and the new Radial Headload Prodigy.