Turbo lag is a grace for street cars because you don't go into boost unless you punch it. I start hitting boost going up hills.....

BB turbo will spool up faster but its almost double the price. However there is little to no cool down time since most BB turbos are water cooled.

I am not a fan of rockers. The only reason I would say to get 1.6 roller rockers to go easier on your retainers.

Why would the ST2 be easier on the valve train when you are still running 1.7rr?

ST5 would net more power

Are you going to port your heads? I remember it being in your sig earlier on.