Yeah there's something a bit niche about a mk5 R32, they do seem to have a special road presence.
But apart from the sound, they stack up badly against the GTI when you consider running costs. Unless of course you (with money to burn) buy one with a turbo conversion in mind... then the 'stage 1 GTI is quicker/better than R32' argument is well and truly void!
Can't beat the GTI really, it's lighter, and goes better with a map. Mine is so torquey now (thanks to R-Tech), and being a k03 it's there as soon as you put your foot down. Glad VAG ditched the 6 cylinder with the mk6 and carried on with the k04. I think if I don't take my GTI further (yeah right..) it's good to know there's the mk6 R and S3 available to handle proper power, if that's still my thing a few years down the line.
Oh, and seriously, get it down to R-Tech. I do understand your 'keep it stock' thinking, but out of all the maps I've had over the years this one has truly transformed the car. Do it