ED30 every time without question. I've had one and a normal MKV Gti as well as my every day cars. I very very very nearly bought a Pirelli GTI a couple of weeks ago (decided it was too expensive as an every day driver). Huge fan of them. I've also drived the Focus and it's quite good as well. Just the usual fast Ford issues like chavs, the plod and the poor dealers etc.
Interestingly, i also drove the MkVI GTI and wasn't that impressed. The new engine lacks character and the car feels almost exactly like an Audi S3. Now i know that plenty love the Audis, but for me they lack panache and involvement. They're almost too good that they make me feel unconnected, whereas the Golf is the perfect blend of capable car allied with good ride and practicality.