Daniel touched on a very valid point of cyl6 running lean. If your tuner is experienced in RB26 then they'll probably know to run it a bit richer as a standard thing they do when tuning. Mention it to the tuner just to be sure.
Your cam selection should be right, I would've gone more lift but should be fine. I see you've listed HKS cam gears, in the past there's been some dramas with them (if they're the older style), so if you haven't bought those yet, I'd be looking at alternatives such as Racepace, Tomei, Toda.
You don't mention valve springs. Are you planning on using the stock ones in that head? If you're on E85 you can run much higher boost so it's worth including a set of springs now while the car is in pieces. It depends on how hard you want to push the turbos, if you're going to do what Daniel has done and stay around 21psi for reliability sake then stock springs shouldn't be a drama. If you're going for max HP and just run them as hard as they'll go and still make power (around 30psi sort of boost), then put better springs in. Tomei type A's will do the job fine, also a few regulars on here swear by Supertech.