can anyone recommend tube amp for dartzeel preamp?

Hi,

I have the dartzeel preamp and dartzeel amplifier combination and love it. I would like to have the choice of a tube amplifier to use on occasion to give me a different feel/sound. Can anyone recommend a tube amplifier that is synergistic with a dartzeel preamp. I will be using it probably 2/3 for vinyl 1/3 for cd. My speakers are moderately efficient 93db floor standing evolution acoustic mm2 with a powered woofer. I am not looking to break the bank as this tube amplifier would be as a secondary amplifier so am setting a budget for an amp to buy used on audiogon at $3,000. I am thinking something between 50 and 75 watts would probably be right.

thanks

Michael