Hi, I'd love to get some advice on my next amplifier upgrade. Currently I have an Arcam Delta 60 amp, Cambridge Audio 640Cv2 and Polk Lsi9 Speakers. My old is is my weak link. I need something that can comfortably drive 4ohms and, ideally, I'd like a remote. Currently the following options are available to me. Arcam A65+. Cambridge Audio 640Av2, Cambridge Audio 740A or Rega Mira. The Arcam is the cheapest option and I like the fact that I can add a power amp later,. I assume the Mira and 740a are a bit better but cost twice the price (the Arcam has bee n placed on special because it is discontinued). Has anyone compared any of these amps against each other? I'd appreciate your thoughts