i am in the process of researching different tunes. i have a 05 ccsb 6.0 4 inch turbo back exhaust, gauges, pyro, trans and boost. I am in the process of egr delete. I have a sct x3 tuner. Question is what tunes should i get. I am gonna use matt at gearhead automotive. The truck is a daily driver and plans to pull a 12k toy hauler 5-6 times a year.looking at matt's SRL, STREET AND TOW PIG. Can anyone tell me the differences. NOt really wanting to hot rod my truck. Just mainly wanting to help on fuel economy and have something for towing. Thanks in advance.