E-Fan, Catch Can, Throttle Body, Headers (LT or shorties will do)
will all be a benefit to you later anyway, so doing them now is a good start.
I would wait for the guys to get the bugs out of the 12' tuning for a few months if I were you.
Save your $ and plan for a Spring install (when the snow's gone)
Early adopters often pay the price by being involuntary test mules.