Did you finally decide which way to go?
. . . OP hasn't been around for . . . 7 months today.
I've had pretty good experience with the OE springs and Koni yellows, for daily driving, longer trips, and even HPDE road course running up to and including in an advanced group. Pretty good doesn't quite mean 'perfect', but it's been plenty good.
FWIW, I don't think I'd run front springs much stiffer than about 250 or 260 lb/in with the yellows in the above range of driving situations - you'd most likely have them dialed up almost to the point of having no more adjustment left. Might go 300 for a track-only (plus the travel to and from the track) car.
'08 GT coupe, 5M, wheels, tires, pads, fluid, a few suspension mods . . . still almost stock height
'19 WRX, 6M (the "family sedan")
'01 Maxima 20AE, 5M (the spare and occasional winter driver)