Hi,
I'd steer clear of some of the "free" black/white stuff you get with a home hi-fi.
Try get yourself some good high copper content, oxygen free cables.
You'll be suprised at the good deals you can get from legit dealers, better prices than you'll get at B&Q for much better quality cables.
(Four Square dealers are usually very good)
I got mine from Megawatt in Runcorn and got a fabulous deal on some Audison Connections cables. Very high copper content and very flexible which helps a lot in a car.
A lot of the stuff on ebay will be of lower copper content. (especially with copper prices rising so fast in the last year or so)
Also make sure you buy the correct gauge power cable.
There is a thread in the FAQ section of ICECAVERN.COM which explains exactly
how to work out what gauge you need with a simple calculation.
(I mentioned it recently in a similar thread on SCN.)
Cheers,
Steve
Edit : I seem to remember there was a reasonable looking dealer with a big
shop near the Asda (Hyson Green??? near the Goose fair ground??) in Nottingham otherwise give Megawatt a ring. Great guys and very helpful.