Got a manual now and if I were to buy one again, I'd go DSG!
Obviously the manual is mechanically far simpler and therefore more reliable, but when you factor in the cost of a clutch / new DMF for remaps, it kind of balances out (DSG doesn't need that doing). DSG is far better in traffic too. Uprated clutches in the manual are annoying in traffic and not as smooth to pull away.
I'd get the DSG remapped too, to remove the upshift when using the paddles. Pain in the rump when you want to hang onto the revs.