hey tze you could'v told us you are buying parts oversea right now...
I would't mind some defi-link gauges, only wish if they sell them at airports or near it as I'll be doing stop overs at singapore for few hrs middle of january.
as for adjustable cam pulleys, do some search on SDU there were threads about turbos shuffle even with stock rb26 turbos as soon as you change cam timings with pulleys, more to do with twin turbos and factory non balance pipe ex manifold designs.
Since you are mainly after ecu tuner with the cam pulleys/power fc probably see lachlan at chiptorque? As most of other things are bolt on which can be done fairly quick at most bris shops.