Amp to replace Audio Research D200

HI all

My beloved 20 something year old D200 has experienced death by cat (don't ask!) and has to be replaced. I can probably allocate $1500 to this task. My preamp is an AR LS2 and I've got an AR transport and an Enlightened Audio Designs DAC all driving a pair of first generation VR4 speakers. OK, so I'm old, what can I say :)

Any recommendations for a replacement amp? BTW, looks like D200s are going for about $1000 used now, so that's a possibility.

Thanks for any advice
Howard