to follow Steve's comments...
your usage of the car should dictate your decision here. in general, seats that are nice on the street, suck on the track; and seats that are effective on the track, suck on the street.
i have had several sets of seats in my supra, including:
1. stock
2. Sparco Milano Prestige
3. Bride Gias
4. Cobra Suzuka (fixed bucket modelled after Sparco Corsa)
5. Recaro Speed
i believe most people don't realize just how demanding a race seat (like the Gias or Suzukas) really are. race seats are very rigid and significantly limit your mobility - as intended. this is a real PITA on the street, however - when strapped into the buckets with a 4 point harness, i could not even reach into the passenger seat to pick up a small object like my wallet or phone. you also have to climb in and out of the car like it's a jungle gym, which may sound kind of cool to some, but trust me, after a couple times - it isn't.
keep in mind also, that a fixed bucket is not compatible with the OEM seatbelts b/c the side bolsters prevent the belt from resting closely enough to your hips - not safe in the event of a collision.
IMO, there's no really good compromise - seats that work on the track, suck on the street, and vice-a-versa. i would recommend NOT running a fixed bucket on the street.
fwiw,
craig