I have a Harman Kardon AVR 320, rated at 55 watts/channel. HK is good with it's ratings and it does put out at least that much. Not too long ago, I upgraded to a pair of GR-Research A/V-1s, and I'm beginning to wonder if I should perhaps spend a bit more money on the amp side now (don't want an unbalanced system). I have a pretty limited budget, and I really have it narrowed down to 4 models: Rotel RB985 MKII, B&K AV5000 II, Parasound 855a, and the Carver AV-705X. My speakers were designed with tubes in mind, and so they are probably best matched with a warmer amp. I am particularly interested in the B&K and Parasound, though the Parasound is cheaper which is why I am leaning towards it (even though I'm sure the B&K provides a better sound). Anyway... Given that the Parasound is rated at 85 watts/channel, and my H/K is 55 watts, will I notice a difference in sound QUALITY (instruments sound more "real", better soundstaging, etc.)? I mean, I wouldn't mind the watts but that is probably giving me less than 2 dB there. The GR-Researches sound great, but I'm just wondering if they could sound better. I would really only upgrade if I will notice a definite difference is sound quality and not just at loud volumes. Is it worth it?