Amp's suggestions for B&W Nautilus Prestige?



...I need advice on amps to drive these speakers (snail), budget is $20,000.
They are 4 ways with active crossover, I need 8 channels 100W- 300W.
Amps will stand on a rack- maximum height is 20".
I am using an Audio Research reference 3 and Wadia 581i se.
I prefer to have gain to every channel but it isn't a must.
I thought about 2 x Linn Akurate 4200 (4x111W each).
http://www.linn.co.uk/akurate_4200

Thank you in advance for your time.
128x128tomer_tsin
My apologies, not the 606 but the 501s and all the reference Krells and the ARCs. I recommend the Phonosopie only because the situation demands an active setup. Let me put it this way, the Krells, ARC and the Jeffs make Kari Bremnes sound like top High end gear playing within varying degrees of audiophilia, the Phonosopie made her sound closer to human with a lesser degree of audiophile pyrotechnics. Anyways its just a recommendation, had the requirement been for a passive loudspeaker I would have gone another route depending on the speaker.
I am using the Jeff Rowland 616 500X2 250X4 and a 201 for the top with PC1. magic. have tried Classe /Parasound and find this is the best.
At that level I would not cut corners with amps. If it was me, and I wish it was, I would have two pair of high end monoblocks with really good biwire coming out of each. Many choices available could go SS on lows and tubes on mid/highs or all the same. My gut tells me like all B&Ws they really excel with amps with lots of headroom. If not you can give them to me to figure out. Ha,Ha,Hee,Hee