Hi I'm new to the world of aftermarket head units so be gentle. I am looking to purchase my first aftermarket touchscreen head unit, and i have more or less decided on one of the Pioneer AVIC-Series (but this isn't set in stone). But Im not sure what would be best. I am looking for the cheapest version that can handle the below. I am looking for the following functionality, for the new HU a) SatNav b) Video/DVD output to a rear screen. c) Steering wheel control d) Ipod connection c) Bluetooth The most important aspect I am after is being able to play a DVD/Video on a rear screen whilst still be able to use the SatNav and radio/ipod on the HU. I was looking at some of the cheap touchscreens HU's on Ebay (Eonon etc), as they seem to be able to do all I'm after, but Im worried about the compatibility with my car, and quality. Any advice would be appreciated. I haven't a massive budget. Cheers