I personally think a full replacement
ECU is a waste of time at that level of mods. The exhaust choice is up to you, the quality difference between a china ebay exhaust / xforce that is designed for a US market (LHD) versus a locally built quality item is big, but the price tag is too. You won't get the issues associated with a china exahust, bad fitment, hit the steering column etc but its nearly triple the price! You get what you pay for. As ballsac has said, the pump is also probably overkill