Lots of options out there, I like the Megasquirt stuff, it has the best feature to dollar ratio, but it does take a little more work to install. I have almost 5 years on a DIYAutotune MS3X kit that I assembled myself with sequential fuel and spark, coil on plug igntion on my small block. It has been a real good experience but I like to really dig into stuff, it was far from bolt together and race.

If I were to be in the market for one of the throttle body units Holley would get my business hands down.