I don't own any of the above equipment, but the best sounding system I have ever heard was a pair of ReQuests driven with a Sunfire stereo(not signature)amp and Grand Cinema pre. I am still in awe of the experience.
Sunfire with Martin Logans
I've got a pair of Martin Logan ReQuests and am looking for a new amp to properly power them. Everyone talks about the need for lots of current, the ability to handle loads down to/below 2 ohms and the benefits of tubes in taming a tendency toward briteness. Given all the above, it would seem that the Sunfire "load invariant" amps (basic or signature models) would be ideal matches, yet I don't seem much discussion of them here. At least not paired with Martin Logans. Does anyone out there have any experience with this pairing? Please advise.