I test drove both - a manual Pirelli, and a DSG ED30. I would have been very happy with the manual - gearchange was very direct and sweet, even compared with my old mkiv which had a TT short shifter (always retained some 'notchyness'). Clutch was light, but nice feel (my old mkiv had a Sachs racing clutch to cope with the K04 S3/TT conversion, and it was pretty heavy in traffic...).
The DSG ED30 I stumbled on, in a way. The advert said it was a manual, but when I HPI checked it, it came up as a 'SA' on the report. I liked the sound of the car, so went to look anyway. The gearbox really impressed me - could drive it as a full auto if wanted, and the tiptronic / paddles if wanting to 'drive' the car as a manual.
I bought the ED30 DSG. Personally, I tend to drive my car in the tiptronic / paddle mode all the time. Best of both worlds, IMHO.
Only thing I miss, is skipping a gear on shifting up or down (ie, booting it in 2nd, I might go straight to 4th, & likewise when changing back down the gearbox), and blipping the throttle on downchanges, but the DSG is pretty seemless...
I daren't think about repair costs, but I hope it is largely bulletproof - not sure, but thought DSG is pretty much the same as Porsche PDK systems?