Revo makes a good one too. I think? I just converted my 3 months deep lease into a sale so I have been looking into it but haven't pulled the trigger yet. If you go to an authorized Revo installer, they will re-program your ECU for a test run of 5 hours to see if it something you want to buy and keep. Sounds like a good deal to me!

http://www.revotechnik.com/

And I believe the other one is APR.

not sure. I think speedtuning has one