I went and bought myself a second hand autocom logic of ebay. I got the bluetooth module with it too. The lot cost me £188. Seems a good piece of kit so far although I've not road tested it yet.
I bought an Autocom a few years ago - was going to try and add music / phone to it ............. Just be careful of your battery charge.
I have an autocom and got the dealer to wire it into a power supply that runs from the ignition, so when the ignition is off no drain on the battery.....works like a dream....