Here's what im going for..

[strachan10]

Ok after everyones help, here is what im going for..

For the back
http://www.caraudiodirect.co.uk/alpine-spr17c-p-5663.html
For the front
http://www.caraudiodirect.co.uk/alpine-spr17s-p-5662.html
For the boot
http://www.caraudiodirect.co.uk/alpine-swd3000-p-4581.html

And a decent wiring kit.

Is there anything else i need to buy?

Am i right in saying that i wont have to buy an extra amp or anything because there's one already on the sub?

Cheers,
Scott

[Hurdy]

If you only want to power the rear sub through the amp then that's fine. If you want your fronts to have their best output then you would need to power them through another sub as the one you have is only a mono.

[strachan10]

U mean power them through another amp?? i think?

Can anyone find me a cheapish amp that would do the job? preferably alpine

[Guy]

are you dead set on alpine speakers?

granted their hu's are excellent but the speakers leave quite a lot to be desired 

[russ-vdub]

yeh agree with guy..get some vibes components for the fronts, the bass is unreal! and deffo need a seperate amp, 4 channel, for your speakers..

[russ-vdub]

oh and with 2 amps, run a 4awg wiring kit with a fused splitter for both amps.

[Guy]

would say that you can do better than vibe - but then again it's then down to your budget and your personal preference...

would suggest that anything is better than nothing... but perhaps have a good try out of speakers before you go ordering