[427orFIAisOK4me]

Well I did it...
Front: Dunlop Sport SP8000 - 235/55/ZR15
Rear: Toyo Proxes S/T - 257/60/HR15

STREET RIDE
a. Very smooth
b. No vibrations
c. The softer rubber still does not make any difference with oversteer when they get damp.

HWY RIDE
a. All of the above still apply.
b. Rides great at LA traffic speeds (75-85mph)
c. At really high speed (120+) steering is very sensitive. Any movement of the wheel is extremely exaggerated, scary the first time it happened.

OVERALL
I'm kinda happy with my choice. I don't tend to speed around town or fly down the freeway often so I think this combo will work for a while.