200w/ch stereo amps: best 1 for under 2000 used?

I have owned or extensively auditioned the BAT VK-60, VK-200, Marsh A-400, Bryston 4B-ST and Conrad Johnson Premier 11A in my home with Magnepan 1.6QRs (86 db, 4 ohms):

BAT VK-60 is rated at only 60 watts, but subjectively sounds every bit as powerful as the VK-200. VK-60 is the best of all of the amps I have listed. The VK-60 is more musical, more transparent and dynamic than the solid state amps below. The downside is that it runs hot, sucks a lot of juice and the tubes have to be replaced eventually. I have seen this amp on Audiogon for around 2K.

Marsh A-400 is more neutral sounding than either the VK-200 or the Bryston, and has superior bass. It does not need much warm up time to sound good.

BAT VK-200, runs quite hot with a slight emphasis and thinness in the upper midrange, but quite musical overall. Needs at least one hour warm up time to sound good.

Bryston 4BST, sounds veiled, less transparent and less neutral when compared to the Marsh or VK-200. You may still want to consider it for other reasons such as warranty and reputed reliability.

The above post has some good advice about speaker efficiency and power. You may want to consider more efficient speakers if you really want to rock.

Aragon 4004 MKII used for around 800.00 each or else go for BAT.

Sean is right. You're gonna' need a LOT of power. Probably more than you may think.

If you're in love with your speakers and don't want to get something that's more efficient, you may also want to consider the Sunfire Signature (600 watts X 2). There is one listed here on the AudiogoN for exactly $2K. I've heard the non-Signature (300wpc) and it was outstanding. Every bit as good as the Bryston and better than the Aragon (IMHO). At more than twice the power of the Bryston, I think it might be a good solution to your dilemma.

That's a HUGE room!!

I'll say the Classe CA-200. It's smooth, like the McCormack and the BAT. Amps is what Classe does best. Give one a listen, if you can. Can be had used for about $1500 or less.

I'm plugging the local product here - but a very underrated option in your price range is the Plinius 8200P (which is the power amp part of the 8200). I have been playing with one (hey, they are only USD1,000 here you know - I am thinking of getting three of them) and now that it has burned in, it beats many of the amps that go for USD2000 second-hand. It has recently bettered a Krell KSA100S (smooth, but lacks PRAT and dynamics), a McCormack DNA-1 (just a little too crisp and grainy, but good PRAT), Muse 180 (smooth and easy, but with a soft grain and dynamically constrained), and a Aragon 4004 MkII (not in the same league of any of the above) - and on some difficult to drive speakers bettered a Plinius SA100 MkIII.

Its strong points - neutral-to-warm balance (once run in), excellent PRAT, dynamic and extended. It loses out to the Class A Plinius stuff in terms of smoothness and the last smidgen of resolution - but the PRAT is perhaps superior.

I have to be careful here. One can certainly nit-pick this amp compared with the best. But I am recommending it enthusiastically for how it manages to put soul into the music and gets you playing your whole music collection.