The alternative to using the FMU is to use bigger injectors. I'm using 36's because I found a decent deal on them plus they gave me some room to grow if I wanted to up the boost. Since I'm swapping the heads and intake this winter, I'll probably get rid of the 36's and pick up some 42's for peace of mind.
If the rest of your engine is stock, 42's would give you a ton of room to grow if you were thinking about a H/C/I package or more boost later down the line but they would be tricky to get a good idle with on a stock engine (unless you had it dyno tuned)
A great place to check out is
www.superchargerhelp.com Nothing but blower guys over there and they are really helpful. It would be worth it to check the site out. Make a thread over there asking the same questions and see what everyone has to say.