Hi m8,
I have recently bought the Pioneer DEH-5000UB as it was more within my budget of £100 and I liked the fact you can customise the button colours and the display colours to match or contrast the cars interior. I have a zen so not fussed about the ipod connectivity. But what I have done which works very well is stick an 8GB SD card filled with mp3 files onto the rear USB out. This is wired into my glovebox so keeps it nicely out of sight but easy to pull out and change over. I liked this idea because I can just leave it in the car and forget about it, and if it did get stolen it's no great loss to buy another SD card. You can use the HU display to scroll through folders, songs etc and even only 8GB is still quite a lot of music although you could increase this capacity considerably.