2 questions- fuel delivery, suspension performance

[gingerbredman]

ok so i've been reading up and thinking about some things.

1st- if you're going turbo, and you upgrade to larger injectors, fuel pump, then can you leave the stock fuel pressure regulator as is? i've been hearing this and that so i'm coming here for some experienced advice. say all this with an ecu tune, to be more specific.

2nd- ok, so recently we obtained another 240sx, hatchback, like mine.. except with stock suspension, and a/c anyways, i was driving (or more like riding since it's an auto) and remembered how good the stock ride was. last night i took a ride in a 944 and hot spam it was like a buick but handled 10 times better than my car.

i have replacement Gabriel shocks, couple years old, with eibach sportline springs. its all aligned and everything, and even with "normal" profile tires the ride really takes its toll. sooo i was thinking about either throwing my old shocks back on or maybe getting some tein H.Tech springs, and upgrading my sway bars, bushings, and get a couple of strut bars.

sure, the sportlines keep the car flat in the corners, but now i have crazy stupid understeer. now, my theory=

soft/stock shocks with stiffer springs = better handling/cornering because the rebound rate isn't too much higher, the tires won't lose contact from bumps in a turn, but the springs will keep the car from rolling.

so my *wish* setup=

sway bars/ stock shocks & springs/ strut bars=smooth stock ride, cornering stability improved with less roll.

also, are adjustable sway bars worth the extra $$$? thanks guys