I am just wondering if it is alright to use a high definition set top box with a Beovision 3, or will the resolution be too high for the screen, resulting in a grainy picture? Thanks for any advice on this!

No problem! all HD stb I've seen has a normal RGB scart. but don't know haw good they are at downscaling a HD signal.

Thanks, yes that's the question, will it still produce a perfect picture in HD. The reason i want HDTV on a BV3 is because i still want to enjoy the 5.1 sound during HD broadcasts when we get more Beolabs, without the HD display hoo-haa (something that is thankfully irrelevant with CRT).