Just for the heck of it, I tried hooking up my HD receiver to my HTR-5660, and then on to my TV. Channels that are "HD" according to Comcast still looked fine, though I don't think I was watching any true 1080i source material -- just movies on HBOHD and SHOHD. I'll try again when ESPNHD broadcasts a game that I know is in HD. I have a couple questions about this component video switching business. First, it was my understanding that the HTR-5660 and RX-V640 were "essentially" the same unit. However, the specifications on Yamaha's website for the 5660 says the component bandwidth is 30Mhz while the 640 is 60Mhz. Does anyone know offhand what the bandwidth requirement is for 1080i? I'm supposing it's greater than 30Mhz, but what would the symptoms of insufficient bandwidth be? Since the signal coming from the HD receiver to the AVR is analog, I suppose the symtoms could include a grainy picture, colors that don't look right, etc. Also, I wonder if the 60Mhz vs the 30Mhz was a "value-added" feature to the 640, or perhaps the 5660 was intentionally crippled in order to get the HD crowd to shop at higher-end dealers for the 640. Or, maybe both are 60Mhz and Yamaha only advertises it as 30Mhz on the 5660 in order to make the 640 look more attractive. Both units retail for $499, so I'd be slightly surprised if the 640 had "extra" features. Any thoughts on what's really going on here? Finally, is it even a good idea to be using component switching on somewhat low-end AVR's like this (I'm not just talking about HD component, but more along the lines of DVD's)? I can see a clear improvement in image quality when using my Monster Video 2 component cables vs the cheap suckers that Comcast provided me...so there's a chance that the internal switching on my 5660 will be the weak link that makes my video quality suffer. Anyone have any experience with the quality of the switches/connections in this or similar AVR's?