Man I wish I saw a STI going for $30k, I woulda bought it! I saw used ones going for that much.
That said the MS3 has pretty much everything I want. AWD would be great if I went to drag strips, but I don't, and I value the better gas milage over the ability to launch that fast. Once off the line the MS3 has all the get up and go one could ask for. One of the better reviews I read mentioned that the car is not limiteded by a lack of power or torque, but by traction and gear ratios. And that seems to hold true for me. The biggest killer when punching the gas is the chirping wheels and the fact that you have to shift about 18 times before 60mph. (ok, 18 might be a slight exaggeration)
As for the AWD mod, didn't someone figure out you could do it for less then $5k? Isn't there a AWD 3 sold in japan?
Oh, my uncle used to have a turbo diesel beetle! It was fast... almost.