SOUNDLAB ULTIMATE 545

Two of my reviews at Dagogo.com that you might enjoy:

Sound Lab Ultimate 545 (at the time called U4iA)
Legacy Audio i.V4 Ultra Amplifier 

Pinotnoir, either the MA-1 or the MA-2 would work well with your speakers. SoundLab has shown with both models, and my understanding is that, of the two, they more recently showed with the MA-1s at Rocky Mountain Audio Fest.

By the way, congratulations on your 545's!!

Duke

OP, you're a lucky man!

Pinotnoir, I have 645-8's, 8 foot tall 645s. Duke is correct about Atma-Sphere but as a rule they work much better with solid state amps. The problem for most tube amps is the extremely low impedance at high frequencies. This requires a LOT of current. Big solid state amps with over built output stages work best, particularly class A. The only exception I know of is the Atma-Sphere amps The two amps they have shown with are the Atmasphere either MA1 or MA 2, atmasphere would know, Ralph you out there? The other amp is the Parasound JC1 which is what I am using. But , I am debating getting MA2's and moving the JC1's to subwoofer duty. The JC 1+'s are about 1/2 the price of the MA2's. The efficiency of the 545's is just a little less than my speakers so you still need the power. Both amps get just as hot which is very so I hope you have AC.  I highly recommend you get a room control Preamp and two subwoofers down the line. You will increase your headroom at least 6 dB, lower distortion noticeably and you will be able to match the frequency response of the speakers/room perfectly. The result will be an outstanding image. I you go down this road give me a shout and we can talk about it. 

mijostyn4: Fisrt of all, congrats for your system.
Thanks for your advising offer. As jperry said, first I´ll have to run with my Antileon and I let you know first impressions.