I think all the info in this thread can be summarised as follows:

-Daily driver, minor bolt on mods -> 2.25" or maybe 2.5" with bottlenecks

-Performance car, all usual bolt ons, cams, tune (or planned) -> 2.5", true 2.5"

-Serious enthusiast seeking big power with major supporting mods -> 2.5" + (up to 3"?)

Or that's what i think