Home cinema advice

[RizzoTheRat]

Currently have a Samsung HD telly, Virgin V+ box, and a Panasonic DVD player with built in 5.1 and relevant speakers. Audio out of the V+ to the DVD player over RCA as the DVD player doesn't have a digital in, and DVD to TV is SCART as it doesn't have HDMI. Unfortunatly if I use the DVD player for sound I get a time delay between the picture and the sound that's really annoying. Hence I'm thinking of replacing the DVD player.

If I get a 5.1 amp can I reuse the speakers I've already got, or does the amp need to be mateched to the speakers impedance? (eg this one http://www.richersounds.com/product/av-receivers/s...

If so, if I got a 7.1 amp will it happily work with 5.1 speakers until I replace the speakers at a later date?

If I get an amp with either an optical or HDMI in will that solve the time delay?

Is there any truth in the belief a mate of mine has that a PS3 makes a very good quality and cost effective Blueray player?

[RizzoTheRat]

Thanks.

Just checked my speakers, they're 6 ohm 60W, presumably this should be a problem?

My previous link seems to be broken, but I hadn't noticed the lack of multichannel audio on that Sony STRDH500. It seems the V+ box does 5.1 over the HDMI so that's a feature I need to keep an eye out for. Having a look a round Richer Sounds website it seems thier sub £200 units don't seem to do this. Are there any dissadvantages to linking it in via the optical instead? What do you mean by "it doesn't decode HD audio anyway"? (sorry, bit of a noob at all this)

Any reccomendations for decent units in the <£200 range?