Axiom Home Page Forums General Discussion Stereo Is Class A better than A/B?

I'd like to pose this question to some of the enthusiasts out there. Is there any sonic benefits going Class A vs Class A/B type amplification. That Marantz PM-7200 mentioned by 2X6spds seems interesting. I also had my eye on the Creek 5350se for sometime http://creekaudio.com/main_content.asp?catlook=53&content=53series
Will I get any sonic benefit replacing my 15 year old Bryston 4B with any of the two above? Any other recommendations would be greatly appreciated.