The Milltek non-res catback might not make as much difference to the exhaust note on the Ed30 as you might think. On my previous GTi, the non-res catback was a considerable improvement on the stock exhaust, a richer, deeper note without any booming. However, my Ed30, after around 5000 miles has matured nicely, and the exhaust note is already comparable to the non-res catback on the GTi. I had originally considered a Milltek as a must-have mod for the Ed30 - now I'm not so sure...
it's not just the sound that matters...
Uphill winding roads - Ed30 will not catch R32, I think, because of the FWD. Are there many roadss like that in Gibraltar?
I personally do not like the look of R32, especially the middle-place exhaust pipes, the chrome in the front. It looks bulkier than GTI, imho.

I've read a lot about R before deciding, it is an animal, but it is expensive to buy, run, insure...
If I had the money I am not so sure I wouldn't buy R32, though I looked more at S3.

Saw white S3 with Recaro sits and black BBS 19" wheels yesterday at the dealers, sweeet
