I currently have a Cambridge A5 partnered with a Marantz CD6002 and Mordaunt Short MS902i speakers. I've never been totally happy with the sound and suspect the A5 is the weak link. I see that Richer Sounds have the Azur 640a V2 amp available for £150 to "VIP" customers, which looks pretty good value. Any views on whether this would be a worthwhile upgrade from the A5?