Vortech Atrim or more boltons?

[PbCobra]

Hi. I just needed some help deciding what to do next and finally on the cobra. I have narrowed down my choices to one of these:

1. Vortech A-Trim Blower

2. 3.73 gears, cam, dynotune/chip

Which choice do you think will yeild better results? Which choice will be less of a headache in the longrun?

For what it's worth, with the mods in my sig, I'm running mid to high 13's. I'd like to be mid-high 12's keeping the car as streetable as possible. Thanks all!