Amplifiers:A Keeper for Life. Do you know of one ?

I'm pretty sure that amps have not hit the point where they can't and won't be improved upon. But, while I'm sure I'll find a better amp, and am currently looking...I'm keeping my MF A3cr anyway, because I would rather have that amp then the $600 I could sell it for. So it's a keeper. The same goes for my B&W 640s. I already upgraded to new speakers, but I'm not giving up the B&Ws for the $400 they sell for used. They're worth a lot more than that to me. Maybe I'd sell them to a friend over give them as a gift, but other than that, they're both keepers.

Carlbecker: I was right where you were with the Berning. Thought I was done with amps for my Quad ESL57s. Then I bought on a whim the Rogue Atlas that Mark makes specifically for Quads. It's sort of half way between a regular and a Magnum. Now, upgraded with KT120s, I have my final amp because I'm never buying a ARC Ref Amp which is the only thing that sounds better based on my listening.

McIntosh 275 or 4200; Luxman 590.

Is this the Holy Grail?
http://www.ebay.com/itm/MCINTOSH-Buy-It-Now-39-ITEMS-Liquidating-A-Large-Collection-Excellent-GEAR-/150767675171?pt=Vintage_Electronics_R2&hash=item231a742723

Conrad Johnson Premier 350 for SS! I sold mine years ago but needed to buy it back even I already have two other tube amps! Lucky I found one as it does not come too often in 2nd hands anymore!