Ignition for 97 Cobra

I have a 97 Cobra and am looking to upgrade ignition. Mods on car are 2.1L KB s/c running 6-7 psi boost, Kooks headers and x pipe, Magnaflow exhaust, Acufab Oval TB, 90mm MAF, 42# injectors, JLT CAI, MSD coil packs and wires, and other stuff. I am looking at MSD DIS-4 plus. I have used MSD 6AL in the past but never on mod motor. Does anyone have this ignition or a set up similar, Please chime in?
 
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i am putting a blower on the car and want more spark, don't feel comfortable with stock spark with forced induction.

It seems to me many guys are running the stock ignition setup comfortably with boost without a ignition box. Before you commit on the upgrade, I'd do some searching on exactly how much the stock ignition setup is capable of handling.