Modeling amps have several SIMULATIONS of great tube amps.The way I look at it if there trying to copy the sound of a tube am must mean theres a reason they want to sound like real tubes eh??
Another way to loo at it is in all the concerts you have been to how many pros had tube amps,how many had modeling amps and how many had solid state.So far every one but one band I've seen has had tube amps.
Tube amps are naturaly more touch sensitive,the slightest change in pick attack is a world of differance.On my single channel Marshall I play a stock strat,one the the one channel I can get everything from a clean sound to a hard rock snarl all in my pick attack.Plug a bucker guitar in and turn the gain a few hairs and you could get a hi-gain sound that is less sensitive but still dynamic.
I also have a solid state Park practice amp its a decent amp or what it is,but solid state it sounds the way it sounds distortion is distortion and clean is clean,back off you attack on distortion it still buzzes cause of the diode clipping in the preamp.
Since I got my tue amp several years ago I have slowly gotten to be allot better player in terms of dynamics.
Moral of that story is get the TUBES.
The modeling amp is good if you need allot of diferant sounds but don't nessicarilly need anone of them great.The tube amp is for dialing in one sound that is top notch.How many pros do you know that have 100 so/so sounds not many right.They usually have three or four great ones.
TUBES TUBES TUBES!!
Certiied Stratocaster NUT!!