Wotcha and welcome Matt - what a result - a right bargain and its got some styling modifications STI esq already completed. Def right place to stick a build thread - easier to keep track of your work all in one place.
I would agree with the performance of the NA engine approach - filter and pipe + a decent service, oil, brake fluid, plugs etc to get it running spot on then if you still want to improve things look at power to weight ratio (ditch rear seats etc) and chassis improvements brakes, ARB's suspension