After dealing with Peavey's recent Chinese tube amp offerings...Yes it does matter from a reliability standpoint. Actually any chinese made tube amp is kind of risky if you plan on having it for years. I've seen valvekings and windsors just crap out due to poor cheap parts.
And sure 4x6L6s do offer quite a bit of headroom. But I see a 2x6L6 offering just the perfect amount of headroom vs low volume cook that I would need. Never in small PA driven clubs and rehearsals in basements have I gotten to crank any 100watt amps to where it sounds great. My B-52 AT100 is always running in Class A mode and it while saggy...sounds great.
I guess ill just have to get a used 5150/6505 and a Attenuator?