Interesting thread. I've just sold my 2008 A3 TDI for a 2007 ED30 DSG. What a GOOD move that was.
I'm enjoying having petrol again, it's decent enough on fuel & plenty of power on the right pedal. I'm loving owning a VW, alot cooler in some ways than owning an Audi. I would say the build quality is near enough on par with the Audi being a little better. Loving the Cabin in the MK5 though, the RNS 510 is light years ahead of the RNSE and makes me realise how bad it was. The one I've bought has had a Stage 1 Remap, its running around 275bhp. It will receive Shark Stage 3 treatment next year so aiming for around the 360bhp mark.
It's a catch 22 with 4WD/FWD. On one hand you have more grip, and better traction with 4WD, but you have added weight and drivetrain loss to go with it. Same as FWD has less traction, but less weight so once it's rolling in the dry it will be very quick. Saw a video recently of a Stage 2 + Rocco R vs a Stage 2 + Golf R & the Rocco left the Golf behind.
So overall I'm very happy with my purchase. ED30's go from around £9-£14k depending on condition & mileage. They're limited to 2500 so they will hold their value well depending on how they are looked after.
I don't miss the Audi at all tbh.