Help KEF 104/2 what amp do I need to drive them?

I recently picked up a pair of KEF 104/2's at a local sale. I have had these hooked up to a new yamaha receiver (around 100 watts)and they sound pretty decent. However, from the little information I have been able to find on these speakers it seems that they are rather picky and like a strong amp. I am trying to find an amp that will drive these to their full potential. Does anyone have any recomendations or past experience?

I am looking to spend no more than $500 on the amp right now and I am hoping to buy used. I have seen several 125 watt B&K amps online. I was also thinking about a used NAD amp. Can someone please help me out?


I have been using a Leak Stereo 20 with my 104/2 for the last 5 years and can not believe how synergistic the pair is.
Has anyone ever used a tube amplifier to drive KEF 104/2 speakers? If so what did you use? I'm just curious. I'm thinking I may try a Jolida JD-502P with a quad of Tung Sol KT-120 tubes in place of the 6550 tubes it comes with. Preamp would be an Accuphase C-200.
I had some KEF 104.2's in the garage, planning to give away. So to test them, I hooked them up to an VAC Avatar integrated (EL34 tubes) running in triode mode,(27 wpc) and it sounded so good that it replaced what I had, and is still producing endorphins.
I've been using a Dared 300b tube amp set for years, with great results. These are very affordable. Efficient speakers.
If you can stretch your budget just a bit, I'd imagine a used McCormack would work very nicely indeed.