Cortex tuner
If I were you I would look into the edge EVO or the gryphon with custom tunes, I have and edge EVO and I LOVE it! I'm still adding onto my truck performance wise, so I'm gonna wait to convert to the gryphon. But I strongly recommend the edge or gryphon. I got mine used with the dash mount for 250. Prolly the best thing I've bought for my truck so far,by far. I hear the gryphon with custom tunes is even better. Check out php on Google at like power hungry performance.com or something. As for the EVO check eBay, Craigslist, even on here
Since you first mentioned the evo I started looking into it. I have to say it's pretty awesome. I'm sold on it and I plan to get the evo when I get home today. So many people just have good things to say about it
www.powerhungryperformance.com
The gryphon is/was an evo, with the aiblity to add custom tunes. Not able to custom tune evo. evo tunes are meant for stock drive train applications. The gryphon can run canned/stock tunes but can have custom tunes added.
www.powerhungryperformance.com
www.powerhungryperformance.com

