I'd do what you say mate, drop it on some small(ish) wide wheels and keep it subtle. You can always drop a 2.0 zetec in there later on or something.

It's all well and good people saying that he should just leave it alone, but you all know what it's like when your into cars. You get your first one and your keen to mod it, so i say go for it. It doesn't have to be fast to be cool.