I use a 2005 Lonestar 2x12 or my Mark I when gigging. I only use a combo of three guitars with them.
A PRS Santana III (pictured at left). A 1972 Gibson SG w/the stock Gibson pickups and a 2006 Schecter C1+ with a Mo' Joe PU in the bridge.
The PRS is without a doubt the best sounding. Full with great sustain. And of course a PRS is so easy to play. It cost a bit though, about $2300 used.
The Schecter is next and the SG last. The Schecter is also very easy to play and with the Mo' Joe bridge PU it also has great sustain and literally screams, whereas the PRS is a little more sedate. It was extremely affordable for the quality, $600 new.
The SG sounds very thin and weak, but I don't want to ruin the value by replacing the electronics. I'll sell it someday as is instead. I play it at home and at practice through a 1968 Fender Bandmaster and it sounds OK. It cost me only $399 new (in '71 though).
The Santana III is more reasonably priced than the much more expensive Santana II. The Santana II's use the Santana III pickups because Carlos likes them, so there is really not much of a difference in tone. A little due to the the neck on the II model, but not enough to pay an extra $3000 for!
I actually use my Schecter the most when I gig. It has great sustain plus the single coil tap. Of course both Boogies have great sustain and tone. The Mark I (with a single 12" speaker) is a little more "classic" sounding and is louder than the 100W Lonestar with 2x12" speakers.
Of course, neither one gets turned up that loud with today's soundmen/PA systems! I have to fight them at times to get it turned up to a tolerable stage volume. Some soundmen want the stage volume so low it's ridiculous.
The Mark I starts to sing at about 7/8/2 (Tweed) on the volume controls (channel 1). 2 is LOUD, and every little increment beyond 2 is amazingly loud for this little amp. I've never had a soundman allow me to turn it past 2½ without pitching a *****. At 2½ the sustain sweetspot is huge! Carlos at his finest, but he turned his all the way up (can't even imagine playing that loud, and we play all types of venues from clubs to arenas).
The Lonestar has too many variables to detail here, but basically 7/7/4 (Tweed) on the volume settings (channel 2), but the sweetspot is still much smaller than the Mark I at the approx. same volume.
Then again, it's all a matter of personal preference.