I'd say stay out of the FCD route. Especially since this is a AFM engine, not MAP based as the old 1JZ.
You wont achieve much, exept wasting money because tricking with AFM signals does not work direcly as with MAP. On a MAP setup you only trick with the pressure signal to the ECU, temperature probe (IAT) is not affected.
On a hot day a MAF might hit your boost cut much different than on a cold day because of the workings of your MAF (A heated electrical wire being cooled by the passing air= MAF Measurement).
VVTi's should go standalone straight away IMO. + Wideband of course.
The Apexi Power FC's aren't that expensive, and also plug&play for this engine. It gives you sooooo much more control of whats going on.
If you are very good with electronics, you could save some money by solder in any aftermarked ECU as well, but you need to have good electrical skills to make it work.
Most aftermaked ECU's support VVTI's. The 1J and 2J VVTi trigger pattern is the same....on MS we therefore use the same software decoder for both engines.