For $2K, I'd think odyssey Extreme monos, used... or perhaps a Belles 350 given the reports I've seen online, and given what my Odyssey Stratos SE does with my tube preamp. I would also have thought that with a nice tube preamp, even the Krell entry level KAV 250 could be a good choice. The KAV has some mighty impressive bass. My only knock on it was the highs were bright. I was using a SS pre at the time with mine. Better results likely would be had with a tube pre though..... having heard and had both Odyssey & Krell, I'm a tad more interested now in the Belles. Purely from the curiosity aspect though.
If you want more the musical/warm amp, the BAT vk500 is a no brainer... especially with the BAT pack opt. I wish I still had that amp. With either SS or tube pre, it's outstanding.