You will definitely get what you pay for. I paid almost exactly the same amount in 2002 for my ATS Stage IV. It's got about 70,000 miles on it, mostly city driving, and it's still the best thing I ever did to my truck. Also, once you get the ATS, many parts inside their trans have been re-engineered and upgraded, so you won't have to replace those parts on a rebuild. For instance the TC--I expect to put hundreds of thousands of miles on this TC--I expect it to be the last one I ever buy. While a stock TC, from what I have read on this site, only lasts about 70-100,000 miles if you are moderately bombed. But I hate to generalize--the bottom line is the harder you drive it, the less the stock trans will last--unlike the ATS unit which is engineered for massive torque and the long haul.