Sugarphreak - good points. I agree that people need to test things out and see how it works for them.
Just an update - I drove 210 miles at 55psig and noticed a bit stiffer ride(which is expected) than at 50psig. I was driving the speed limit(60-70mph) using cruise control encountering very little traffic on the interstate and noticed no handling differences than at 50psig.
NOTE: I forget how the FIT handles in the 30psig range.

-seriously.