well matey, options are the new pioneer double din range, i had the avic d3 bt.and now they have upgraded them very nice peice of kit,
bluetooth
dvd
ipod/iphone
mem card slot
usb
very nice and being pioneer youl know its good.
speaker wise it comes down to budget .i mean they start at 20 quid and go to 8k. mine were 550 just for a front set, and they are brill. but had them powered of 1k amp.
as im quite into audio and had a full sq setup ino a fair bit, so if need any help dont mind helping matey..
i would sugggest the hertz audio tho, there are 5 different ranges they do.
hope this helps..