well whilst ur car isn't to far from stock mechanics own't make a difference, find a guy u like who appreciates ur car, and find out what oils etc... he uses, stick with him, or if u use 1 workshop for all ur mods, use them
exhaust, frount mount intercooler, pod or upgraded panel filter should definitely be ur first plan of attack, followed by a simple boost controller up to 12 psi (ish)
the computer and that's about as far as u can go before u need bigger turbo, injectors, fuel pump, cams, AFM (air flow meter), then forgies and so on,,,,, how much cash u got.....