OK some caveats
I bought my SC as a kit from Brennspeed. It was the stage 3 Edelbrock E-Force.
I've since upgraded to the 675 HP with smaller pulley, ford racing fan and 175 degree thermostat and tune revision. Mind you I don't drive it over the winter and I don't drive with my foot in it. It's only been in boost at the track and three times on the street.
My opinion of brennspeed is they do a good job. I can't tell you how to evaluate a tune, but any of the three you've mentioned have a good reputation.
Why not keep the car registered in VA, that way you can go with a higher horsepower kit to start with and not worry about california
Don't know why you are going to be there 2-3 years but because of that you can always claim VA residence. and I'm sure they have 93 out there!
And with out tires, you're 1/4 mile times are going to SUCK!
I ran a MT 245/40/18 DR before SC and it was pretty good. With no converter and launching at even 1200 rpm, as soon as it hit second they were up in smoke.
Best time was an 11.4 my 60' suck 1.8 which was less that I did with out the SC.
I got 275/60/15 MT DR's last spring buyt work and weather have kept me from going out and seeing if I've fixed the problem. And before all you all jump on me, I'll take any of you on at my tracks here in western PA where we are almost 2000' above sea level, and 80-90 % humidity in the summer. You'll run ****ty times as well.