Update
So, plans have changed. I went from having that heavily modified subaru to wanting to do this as well. After driving the 1 for a bit on downpipes, intakes, jb4, and an e85 mix I am happy.
Instead of dumping a ton of money into it that I wouldnt get back later I instead decided to pick up a second car. A 2009 Black on Black C63 AMG.
However, I'll still have the 1 and could still do things down the road. I'll get a little photo shoot sometime of the two cars though once it gets in.
Sorry for the let down on the big plans for the 1, at least for now.