So this is what I'm getting from you ... and this is my recommendation.

You need a reliable fuel system but you're not going to be boosting the shit out of it. Am I right?

Tried and true ...

Get a Vortech SFMU (get this because it's used so often on the board that you can find any tuning information regarding this using a search).

You can keep your 270s but I think it's a little on the small side for anything over 10psi. But it's up to you. You can "tune" the SFMU to use these. Go to RC Engineering's site and find out what you want to set your rise rate to and your FP at full boost (peak power). Your rise rate may change slightly based on what your base and idle FP ends up being. For this you should get the bleed valve accessories so that you can make those small adjustments.

Get a Wideband O2 sensor as it's the only way to keep an eye on the motor.

Also, work up ... don't go cranking it up to 15psi ... start low and get the hang of tuning your car ... then go up. There is a learning curve for all of this and you'll get a better feel of how your car is responding to all these little changes you're making.

-"Easy Mac"
05 Mazda RX-8 (RR8 #88)
99 Eclipse RS 398whp & 372lb-ft