I'm on the fence here, a ton of people say to get an SCT tuner however from AM they do not come with free tunes for life. I am comparing the SCT SF4 and the BAMA X4 here. They are nearly identical except for the name at the top. Apparently SCT has better default tunes but if I am going to be slowly modding my car over time then I want free tunes for life. Also apparently many shops use SCT. I'm torn here, guys, help me decide.