You will get perfect headroom with a 100w with a drummer/Band

 The 50w clean will break up pretty quick if your competing with a drummer  without  the amp mic'd

 I was really just saying from experience that all the 50w amps I've played before have not been "completely clean" when turned up @ a band setting w/ out a mic
( not  just the OTS, all amps in general ). This is of course  my own opinion and I guess it really doesn't apply to the Non Hrm or Hrm OTS.

 Yes in the bluesmaster the cleans in the 50w have to be dirty'd up because even my 100w bluesmaster gets a little gritty with a band setting w/ out a mic.

 It also depends what speakers your using and how many. If you're going to be using a 2 G-12-65 type speaker it will definitely break up in a band setting w/ out a mic even. The EV has alot more clean Headroom and you may be able to have a clean sound with a 50w 

 There is really a bunch of possiblility's depending on your setup,guitar of choice, speaker,how many speakers that will be used, etc.

 If Clean Headroom is what you're after I would suggest the 100w, pending speaker choice the 50w would be suffice too.

run the KT-88's they sound beautiful, IMO they are superior to any other audio tube that can be used in these amps

would i inquire to be correct that the KT88's have much higher headroom as well?

what wattage should i measure with 2xKT88's. i'm glad i've read a lot about them working so well in this amp because i've always wanted to try a kinkless triode.