XTEC, for standard is not worth the installation and price.
Emanage can use for AF adjustment, timing, increase engine rev, and many more. Without any engine enhancement, most you may get maybe 5 - 10% extra, if you already got one than give it a try. If install properly and all the wires are connected, it can do lots of things.
Beware, not many installer know how to install all the feature into the A32 cause is not common.
You can read up this article from VQPower,
http://www.vqpower.com/images/howto/euinstall/DandyMaxEUWriteup.pdf