my 2 cents is that if track duty is your primary MO, the cooled systems will provide more consistant power (310 or 400). Both the TVS and M62 blower platforms benefit from a cooler on the road course. It's *not* an issue of "safety", but a simple issue of power. The sustained blower loads on the track generate more heat than even the most aggressive street driving and the addition of the charge cooler will help to keep much of the power that would be otherwise lost on the esses.
My personal street car is a TVS300 with a decat and Silent Touch, but otherwise stock. It's sooooo simple. Easy to install and makes a fair bit more power than any of the non-cooled M62 platforms, ie Rev250, Katana265, the old BWR kits, etc.
So it just boils down to preference and use. In any case, I don't think you'll go wrong. All the kits are perfectly upgradable.
I hope to be working a 400WHEEL horsepower tune for the stock ECU (with a built motor and cams of course. We detune the Rev400 for the stock motors to make about 300wheel horsepower. Currently, the only way to get 400wheel hp is with standalone EMS) in the off season. We'll see...