Decent ICE equipment in the UK?

Can anyone out there point me to a good supplier of car audio equipment (preferably with an online presence) in the UK? I'm based in Manchester and have found a few places locally but I'm not sure how competitive the pricing is, I'm not a car audio aficionado!

Cheers,

Andy M

Andy - here are some suppliers that I used when researching my car audio upgrade :
http://www.cel-direct.com
http://www.caraudiodirect.com
http://www.incarexpress.co.uk

You could also pick up a copy of "Maxx Power" (and before I get any yah boo hiss responses) it has a LOT of ads for price comparisons, and the majority of advertising dealers show URLs for online purchase.

'Course, I only buy it for the adverts, you know...