Looking for suggestions for amp upgrade

I have $4000 to spend on amps(or amp) for my system. I would like to buy used. I currently have 2 PS Audio GCA 250's bi-amping Von Schweikert Vr 2's. Any suggestions would be appreciated. As noted on another thread I have been eyeing Rogue M-180's
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As noted on another thread I have been eyeing Rogue M-180's

And from the other replies in that thread, they all said to get the Rogue.

So, what are you waiting for....just get them.
I recommend the brand new Spectron Musician III Mk2 w/V-Cap upgrade listed here on Audiogon, direct from the company for $3,995.00.

It's 600 watts @ 8 ohms, 1200 watts @ 4 ohms.

I bought one and like it much better than my previous Karan and Burmester amps.

Have you ever heard any of the Rogue equipment? I presonally love it. If you can find a good deal on the Rogue, you can probably get what you paid for it if you don't like it. It would be nice if you could listen at a local dealer.
I love my Parasound Halo JC1's I think you can find preowned for less tahn $4000 .. great amps!
I second Curio's recommendation of Parasound Halo JC 1's. sweet highs, mids, and if you like bass they got it.
What about the Ayre V-5xe?