For mild street use, I'd say B&M is about as good as any.... Ordered one for a buddy's car, the tech I spoke with seemed to really know his stuff, the converter stalled within 100 rpm of where he said it would!

All the super trick, hi dollar stuff is nice if you're running an engine that has had every little trick done to it to maximize torque and horsepower, but for the more common stuff, I'd say just a phone call to you're favorite tranny company and a good conversation on what the car has and what you want the converter to do will be just fine.....