What Cams? Rb25/30 Gt35r

[wsln33]

Ok guys, i am in the process of building a motor/driveline for my car and i am in need of some expert advice as i dont have much of an idea on cam choice. I purchased a rb25/30 with forged pistons, o-ringed block, shotpeened rods, rod bolts etc etc at too good a price to let go. The head has been setup for vct and comes with the n/a cams. The head also has heaps of porting work done to it. The turbo i am using is a gt35 with the 1.06 rear and its rated at 700hp. I have worked out everything else in my setup and have almost everything except cams. Im after an easy 300 and up to 350rwkw in street tune and up to 400rwkw race tune. I dont want to rev this engine too hard so ill most likely have the rev limiter around 7000rpm as peak power will be made below this anyway. Ive done extensive research on cams/springs for rb25's but still am unclear on these things:

1) What cams would suit this setup?

I was thinking either poncams 256 260 or 264 but which ones?? Some people say ditch vct at this power level? If it is already setup how do i ditch it? Just unplug it? And if i do ditch it can i still use these poncams?

2)What springs if any?

Are the turbo springs any good? Would they take 28psi? Do i need to replace them?

Thanks in advance