I'd choose the Ed30 all day long. The scope for tuning is massive, whereas a REVO remapped R32 makes a paltry extra 15 bhp, and 250 bhp is not a lot for the extra weight over an Ed30. Having test driven a R32, I can safely say that my K03 Stage 1 GTi is comfortably quicker, if not from the lights, but hopefully I'm growing out of the traffic light Grand Prix! £500 on Stage 1 for an ED30, and you're close to 300bhp!
The noise of a V6 is intoxicating, I had a V6 4Motion with a Milltek and that sounded amazing. However, It wouldn't be enough to sway me.