Hi..I'd like some advice about the best amp to buy. I am more or less starting from scratch again with my system. I've replaced my varus5000s with a pair of diamond 9.1 speakers. Looking now to buy my amp. I think I have narrowed it down to 3...Marantz PM6003, NAD C326BEE (one speaker output putting me off this one) or the Yamaha AS500 (extra 50 bucks pushing my budget) Only inputs to it just now will be my sony tuner and ipod, I'd be looking to add a CD player later this year, so can match that to my amp later. Anyone any thoughts on my best option? Thanks