Very nice, it'll be the best mod you ever do. They actually just released the v2.5 client which I just got today. I cant say enough good things about this system.

You've definately made the right choice to have this as a starting mod. Extremely good baseline for future modding, and I can attest that this system will allow you to take your setup further than any Safc and datalogger ever could.

As far as first things to start off with, if you're still on stock fueling and stock turbo dont expect much. You'll likely find you can turn the boost up another psi or so, and thats mainly it. Your turbo wont be flowing enough to get you onto the highest airflow maps within the ecu so your timing will already be very high, normally with larger turbos you can add a good bit of timing as well, or subtract it depending on the particular boost level you are trying to achieve. Of course you'll have the other features that arent simply tuning based but just kickass in general such as anti-lag and stutterbox, as well as CEL features, but I'm sure you've read about them or will soon. One mod they did on the v2.5 client is redo their boost-est feature, so you have a very accurate estimation of boost for those without a 3bar map sensor, or other 5v loggable map.