I just got mine installed this past weekend. I run 420 injectors and am just now getting it under control. It is alot of work to tune and get setup. I got a good setup goint right now. I have 2 maps that I am messing with. One is alittle lean under boost and the other is rich. There are many people on here that can set you up with a good starting map. You will still have to tune more. It takes alot of playing to get to run like the factory ecu but IMO it is so worth it. I love it and cant wait to turn up the boost.

To answer your question I would go with the msns and afpr over just the sfmu. Would you buy a set of 16in rims knowing you are going to want 18s later? I wouldn't and thats why I still have stock 14s.(somebody hook me up with 17 black and crome lip please)