I don't know what speed rating OEM was for you, but I seemed to think they were just S-rated Firestones. That said, a T-rated would work just fine, and at Tire Trends, you can find these which I am quite impressed with what I've heard:
BF Goodrich Traction T/A: $87.01
Yokohama Avid T4: $86.09
Taxes, shipping and install on top of that, and should also be available from a local tire shop. Both should be excellent choices, my personal preference of the two would be the BFG, but I would be happy getting either for a T-rated tire.