Yeah, the AEM EMS is a very pricey (but has tons of features) when compared to a universal piggyback that would do the job for around $300. While you're at it, buy a bigger fuel pump. It is the cheapest way you can turn up the boost without ruining your engine. From what I've seen, stock internals of most well designed engines can handle around twice the factory rated horsepower before they have problems, so fuel is your limiting factor. Most turbo kits I've seen make like 6 psi.

Get ahold of a wideband O2 sensor, and make sure whatever you decide to boost at is safe for the engine.