Amp recommendation in the $6000 range

Devialet 200 or Belles SA-100. The latter may be specified at 100 watts/8 ohms "only," but its specs are supposedly ultra-conservative.

I have heard the V3's with Pass XA100's, Hovland Radia, Bryston 7BSST, Chord Monoblocks ($26,000; can't remember model number) and Rowland M312 in the same room. The Pass Amps were the best to my ear...excellent synergy with V's. May be a tad out of your price range used. Rowland M312 was a close 2nd, perhaps lacking in bass slam/depth compared to Pass amp....not by a wide margin. Bryston Monoblocks were a bit thin or perhaps lacked the warmth of the Pass/Rowland variety. The Hovaland Radia was too polite across the frequency spectrum for my tastes.

I'm surprised the 500 watt Rowland M312 would lack bass compared to the XA100.5, I guess we're comparing stereo to monoblocks. I had a X250.5 years ago and it sounded great which is why I'm considering Pass Labs again.
What's the difference between the later X350.5 compared to earlier, the specs haven't changed.
Thanks for the input guys, I'm researching each amp you've recommended. 

Quicksilver Audio V4 mono's would fit the bill!