MiniMeonBoost

I'm kinda in a bind between installin my t3/t4 turbo on my lo comp D16, or getting an engine management system ex. AEM EMS, or GReddy E-Manage with a Profec EO-1. I already have the snail, manifold, and wastegate. I can take it to my boy to get Intercooler piping made and a downpipe, and be on my way . I know I will gain power, and a lot of top end, but will lose a lot of bottom end with LAG. I have the GReddy kit now and it doens't lag much. I am hittin 13.30's and 13.40's now, I figure 12's easily possible with big snail, but I think I can hit 12's easily too finely tuned with GReddy kit @ around 14PSI. I figure about a 105-108MPH trap will come with big snail , but the same being tuned with little snail. Someone help me out, some advice. I just don't want to lose driveability with no boost until 3000RPM
and full boost at 5500RPM. Thanks in advance