My modest amp collection consist of a MiniWatt with diode mod and a DIY TK2050 power amp with a Aric tube preamp and a Rotel single ended tube receiver. I'm looking hard at some Chinese 300B and 2A3c amps and would welcome any recommendations.
Nice job on the Frugals
2A3 could be very tasty with this driver - would the Bottlehead Stereomour be out of your budget? One of my favorite combinations was prior Paramour Monoblocks and FE127E in small room. With the 126's extra several dB of sensitivity 3.5 watts would certainly be enough for my needs, but of course YMMV.
There are also some interesting new amps from Shuguang - marketed by Ian Grant (and perhaps others) that could be worth a look - EL84 & EL34 P/P at $575 & $785 respectively to 300B SE at $2100 (with Treasure series tubes, or $1475 with standard Shuguangs)
Never overlook the Decware Zen amps - several flavors of factory built or kit EL84/SV83 in either triode or pentode, 6V6 and finally EL34s.
Then of course there are too many circuits to mention for DIY scratch builds or part kits, including such as the Tubelab SimpleSE (a wide range of ouptput options) or Simple PP. I built one of the latter with EL84 in pentode, and got gifted with the budget to spring for a complete set of Psvane output and drivers - not a waste! This one is driving a dual driver Mark Audio EL70 system, which is probably about 5dB less sensitivity than your Frugals, and the largest room in my house, so the extra grunt over any of the lower powered triode amps is very helpful.