Smurf that is the extact setup I had in my gtst when I tracked it. I ended up with around the 200rwkw mark (on a safe tune for track) and it survived without issues for years when I was running on street tyres....
Engine wise....FMIC, ECU (in my case Wolf but PFC's are around the same cost these days), stage II highflowed std turbo with ported exhaust manifold, always ran castrol edge 10w60, oil cooler. Oh and a good free flowing exhaust.
Apart from that I recommend upgraded clutch (if you haven't done so already) and upgrade the diff. Also run good brake pads and fluid together with braided lines. Also at least have an oil temp, boost and oil pressure gauges so that you can keep your eye on things.
In all the years I ran this setup I never opened the block and the only issues I had with it were the coilpacks breaking down and the std exhaust manifold cracking. At the end of the day as long as you over service the car and have a good base to start with it should last.