VF34 is fine, big improvement over the td04, your not really going for massive power are you? youll be happy with a 34. and again coz ur not going for huge power, just an improvement, an upgraded top mount will be fine, youve already got the pump, and pretty sure my02 has the 440cc injectors? or do they go to the 550 like the sti? either way the 440 can be sufficient for a mild increase in power over stock, vf34 is good for over 200kw atw, so plenty of fun to be had with that. straigh swap for the 34 also.

being your everyday car and wanting to keep it very streetable i think a vf34 is perfect for ya, can run mid low 12s with the right combination of mods and still have it a very nice daily

oh and yes dont forget to keep ur handling and braking mods on par with the mods!