After looking at all the options I decided on megasquirt. Out of all the options it seemed to be the most cost effective so that's what I bought. I haven't gathered all my pieces yet but I have emailed the guys at megasquirt directly to ask some questions and they responed quickly and were very helpful I've already wrote a base tune that should work well. Took me a few days to figure it out but I love the tunablilty.