The ed30 is more due to rarity, different bumpers, interior and a Ko4 as opposed to the Ko3. If the monies there then i would personaly go for the ed30 due to the much higher power gains that are possible.
DSG or manual i would of thought it is down to personal preference, i wanted manual as DSG is more expensive to keep tip top however it does increase the 0-60times and ofcourse you feel like an F1 driver with your flappy paddles :)
I get around 30mpg, depends how heavy you foot is, its seems to drop to 7ish when your giving it beans, but ive only had mine a week :)