I've discovered that the TVs really have lower sensitivity than their 97 dB claim. My Cain & Cain Abbys (95dB) play a fair bit louder at the same volume setting on the same preamp and amps. I'd estimate the TVs at 92 to 93 dB.
What that means is that a traditional 4 to 8 watt SET might not cut it. I'd stick to amps that can put out at least 12-16 watts. There are a number of 845 amps out there that ought to fill the bill - the AQ1009 already mentioned would be a nice choice. A KR amp that uses the 300BXLS tube would be worth considering. I have a KR 18 BSI that drives the TVs beautifully. Parallel 300B's is another choice. Coincident OEMs one - their MP300B, which is actually under your budget.
What that means is that a traditional 4 to 8 watt SET might not cut it. I'd stick to amps that can put out at least 12-16 watts. There are a number of 845 amps out there that ought to fill the bill - the AQ1009 already mentioned would be a nice choice. A KR amp that uses the 300BXLS tube would be worth considering. I have a KR 18 BSI that drives the TVs beautifully. Parallel 300B's is another choice. Coincident OEMs one - their MP300B, which is actually under your budget.