Yeah, there is LOADS of room for it round the back there. There has to be, that stupid Parrot thing wasn't exactly small either. The amount of cabling I had to pull out was unreal. Anyway, I guess that will get popped on ebay soon enough, along with the MFD2. I still have the original stereo for the ED30 too, so when it comes to selling it (if I ever do, I do like it loads, and have always wanted one), at least the stereo will be a point of negotiation.
Next on the list of things to get is a highline cluster (I did already buy one, but it's not from a GTI, so will open it up and see if I can change the dials), then a MFSW, or at least the buttons / module for them. Might see if I can get one from a normal mk5, swap the module / buttons over, and put the normal one in the Passat, since it's steering wheel was destroyed by some horrible wheel cover that was on it before. After that (well, once I have sold on the MFD2 and Parrot), I'll look at a rear brake upgrade, then look at more power (it already has cat-back exhaust, induction and S3 intercooler, so I'm thinking decat then map. Then inevitably clutch).