[theminiv]

Right ok then,

I would change the Head Unit if you can. I understand that audio is expensive, but when it is done right, it sounds right.!!!!

I dont mean anything by this but the unit is a bit basic, it has all of the features that sony supply, but is not the most solid of units.

If you like good sound, try Sony MP 70/80, £275 from the mags.
or, Alpine, but expect to pay over £250 for a good one.

Personally i wouldnt touch pioneer, too much work to get a good sound.

But if you are not ready, dont bother cause car audio needs to be done in stages. I have spent in total, £5000 to get the right system, and now my system is worth £1750, alot of dough wasted!!!! But it is worth it.
(DEAF AS HELL THOUGH, SO YOU WILL HAVE TO SHOUT).