Most people on Here Swear by Black bear , and Mot people on LS1Truck swear by Nelson, I have herd great things about both But My engine Guy has a long history With Thunder Racing and so thats who I went with. I am very Happy so far. Hand held wise look at Super Chips Hyper Max or Core Tex, or Deoblo they are the ones I know of I had a Super chips Hyper Max before My tune, My sisters Hoe has the Core Tex by Super Chips, My fathers Hoe has the Edge Juice with Attiude but He has a 2008 year Model He Swears by His. It even has a heads up display and He updates it all the time and does the date log crap.