I have a little different opinion but not too far different.

Stock bottom is good to 300chp so if your happy with that then stay there for now. As for the SFMU....i dont liekit i had it and sold it, same with AFC which i still have for sale. Looks nice but not accurate enough for me.

my advise is get a stage 2 kit either hahn or star. if you build you own that is ok too. Use the 12:1 FMU for a while at 5psi. Then save up for 8 injector setup. they are getting easy to come by with MS becommig more popular. for the money you will spend on a SFMU and AFC you can get a good used 8 injector setup ready to bolt on and have a very good fuel management system for future plans as well. Its very easy to tune. I wish i would have done this becasue i lost money selling my SFMU and I am stuck with the SAFC now.

Later if you build the bottom end you would not need to worry about the fuel system.

At first i had my star stage 2 at 5 psi for 2 years with the basic fuel setup and my EGT's were no higher than 1450. Wideband is a great idea as you know and techedge makes a great one at a perfect price.
Good luck

Terry