whats the best tuner/ chip... what are the perks of having one

 

I hate to be this guy but since you only have a few post ill say it nice. Use the search this site has a ton of info goto the tuner section its the first forum on here. I would say troyer is the best but just look around

 

If you plan on keeping the truck for a while defenitely get a custom tune. Well worth it.
Benefits are being able to adjust shift points and a few other things. Do a search and there will be more than you will be able to read.