I have this unit in my motor
http://www.pioneer.co.uk/uk/product_detail.jsp?product_id=8308&taxonomy_id=25-109 its a really good unit, but a lot more expencive than the centurion, i work for motor world and my store keeps the dvd/cd centurion units in stock, there a great little toy, but the cd/radio displays are pants, remind me of the old bbc computers!
if i was going to buy another unit now, but with in budget i would get a 2004 spec unit, the ranges are changing at the moment, so you will get a bargin some where, try to look for just a AV screen, pref with AV inputs(phono style) and you PS2 will plug striaght in to it, then you can play games and watch dvd's, plus keep you current head unit to control the sound, you will save a few quid and have a great set up,
plus, having a games machine in the car is a great idea, i got my game cube on my screen, only ever used it about 2/3 time, but on friday morning got stuck in traffic that was showing no signs of moving, so the next hour passed pretty well!

hope thats useful, or is it just another of my useless babbling tangents???
lol
stu