I've had my Craftsman Professional T-15 long-shafter for a decade now and it's never let me down. Most Sears stores do seem to carry them (although it's getting tougher to find some Torx drivers a la carte anymore, namely the smaller ones with the green caps--which are perfect for working on newer laptops).

Another advantage to Craftsman is the lifetime warranty. One of my Torx drivers with a plastic handle and shaft (pretty sure it was a T7) cracked. I took it back to Sears and they swapped it for a new one, free of charge.

As a bonus--many of their products are still made in the USA.

It's one of those brands you just can't go wrong with, right up there with Nicholson files or Wiss shears. If only Stanley would bring some of their manufacturing back to the States!