If intakes aren't that expensive, do that as well along with your exhaust. Personally, I wouldn't do either with a eventual swap in mind, because I hate buying parts and take a hit of them because I have to sell them off - I only buy them when I can keep them for long term. STi take-offs for suspension should be good too if you're not too high on adjustables. As for the rear brakes, might be better off going JDM and get the 2pot setup, or the legacy rotor upgrade along with the WRX calipers.