The LXii has a loud fan. For a bedroom it could be annoying at low volume but at a rehearsal you’d not notice it.I've thought about that sort of rig. I find my Fryette PS-100 is a little bit noisy and I have heard complaints about the LXII being noisy. While this is not going to be an issue for live use, how do you (or other LXII owners) find that setup at lower volume?
I think this sort of setup can be pretty powerful because you can run it in stereo or wet/dry without hauling a ton of gear.
To me the easiest way to get a modeler to sound on par with a tube amp is to run it through a "neutral" tube poweramp like the Fryette into a real guitar cab. Using studio monitors, PA type FRFR setups etc is always about dialing those cab sims to perfection and the end result is still closer to what the audience would hear through a PA.
There's also no substitute for real actual volume. If you are going to compare to a tube amp, get a decibel meter and make sure you are actually playing at the same volume. When modelers amp sim behavior is indepenent of their volume, we often run them quieter and then perceive that sound as "not as good" as a tube amp that needs to be louder.
I echo what others say in that you will notice the feel and thump associated with a good old valve head. The models translate very well.