I went with an AGR rack when I replaced mine and I’m extremely happy with it. My rack wasn't worn out but it felt like it had a dead spot at the center of the wheel travel which made it sort of scary to drive. I noticed an immediate improvement after I installed the AGR rack. (The new rack didn’t completely fix the vague steering feel that seems to plague our cars. That took new A-arm with new bushings and a solid Borgeson steering shaft.)
I purchased mine through Summit, but a friend of mine called AGR directly and had them build up an extremely low-lash rack for his race car. I think they also offer different turn ratios depending on how you want yours setup.
Just in case you haven’t swapped one of these racks before: keep in mind that you’ll need to replace the Teflon seals on the PS fluid hoses. These are a pain to install without a special bullet-nose too to expand them over the fitting threads without having the threads tear up the seals. You might want to find a local parts store that can loan you the special tools (there are two sizes needed) before you tear into your car.
