10Y to 300B tube amp made by Oliver Sayes. It's custom, so you can spend as much or as little as you want on parts. I would totally do Dave Slagle's iron, but you can go cheaper on iron. It will drive your 100db speakers fine. I am using an amp of similar design that can run 10Ys into 300B, 6A3 or 275A (WE tubes) with changing a few switches. The main issue is that my speakers are 92db right now, so I stick with 300Bs. In either instance, it is perfect flexability. If I was running 100db speakers, I would look at a 45 or 46 amp. I never listen to 100db. But there are so many tubes that can drive 100db speakers.
Shawn