Best tuner for a Chevy 6.0 gasser

Looking to get more power from my 07 suburban with a 6.0 liter. Was thinking about an off the shelf tuner like hypertech, superchips, etc. No need for a custom tune. Anybody have a preference with one that you have used?

Why no custom tune?? Its proven to get better power /mpg than a handheld..

I'll say that I had a Superchips in my lifted 06 Silverado in order to correct my speedometer. I put the tune on it as well and it didn't do much for me.

Check out http://www.gmfullsize.com for some good advice and humor. The name that comes to mind is Nelson Performance or something. That would be money MUCH more well spent.

drew-
What custom tune guy have you used?

Hypertech is a waste of money.

I agree with Drew regarding the custom tune. I had the Westers custom tune installed on my 6.0 and it made a noticeable difference. The transmission shift points are also much better. Combined with a cold air intake it tows very well for a gasser. They were even able to tune it for the weight we are towing and to tow at altitude. Money well spent.

Here are a couple of more links: http://www.westersales.com/ http://www.denalitrucks.com/

I've had custom tunes in the past, and was very satisfied with www.pcmforless.com. The only drawback is that it's a PITA to make any changes. I have been doing a little research of late, and considering getting a Diablo Predator. Seems to be the best of the handhelds.

Also Nelson's Tuning. Have the torque management mostly removed.