Hi
I fitted my own and it took less than an hour to do, its not that difficult
I can also recommend the the parrot mki9200, it will give you full handfree and you can insert a sd card and play all the mp3 you want, think there about £200 fitted
or I can recommend one of these http://www.ebay.co.uk/itm/361703588070?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
there only a tenner, offer full hands free, it connects to phone via bluetooth, plays all the music on your phone, through your car speakers, via a fm station, as its got a fm transmitter built in, its even got a micro sd slot on it, where you can play mp3's directly from, so need to connect a phone if you dont want, cant go wrong for £10, I've got one in my work car, works really well
cheers
Joe