TECH PACKAGE. Get bigger wheels and stickier tires and everythings fine, and you can always upgrade your suspension with parts that aren't electronically controlled later. I think my non sport X5 3.0i from 2006 would be a lot "tighter" with 177's and some stiffer springs, but after owning a touareg with a computer suspension, NEVER worth it, especially at that price.
And yes 128i is too slow, I'm competing with my friends and their stupid supercharged mustangs here! I'm thinking more 335xi though. 1's too small in the back for the things I need to use it for... And I might need my snowboard rack again