The difference is only 30bhp to start off with (along with all the extras over std GTI), when you start tuning the difference gets much wider, Stage 1 GTI 245hp stage 1 Ed30 300hp, stage 2 GTI 270hp stage 2 ED30 330hp
K04 is great for tuning and since you joined here you will be
spending shed loads modding before you know it
Car sales are slow at moment, thats not good news for you selling, but good news for negotiating on a new one (swings n roundabouts).
I think Ipod con was an option.