#1
are kustom amps good, there's a bunch in my local store but ive never tried them out and i was just wondering
#2
the tube ones are great. the OLD solid state ones are nice too(specifically the trems.)
#3
i have an old kustom tube amp. it sounds great with my epiphone les paul. if you crank it of course the tube distortion is awesome. i would get a tube one.
#4
I have the 25 watt "12 gauge" model. I think it's pretty good for the price.

Edit: Of course, I haven't played very much through other amps, so I'm not sure how it compares. Standing alone, it does alright though.