Is that $375 per seat? You can pick up a set of Kirkeys for a lot cheaper...
Sure, and you can pick up a used go-cart seat for $25 or go with a couple of Sparco competition seats for just over $4000, so what does it mean?
Honestly, every aluminum seat I ever had my butt set in was as comfortable as a bed of nails and was seriously painful after a short period of driving around.
Some users have posted before that the aluminum seats can be adjusted (read: bent) to match the driver and be much more comfortable.
I don't know, I haven't set in one that was bent to fit me yet but I'm not really comfortable with the fact that the structure that's supposed to hold me in safely can be deformed like that.
In that sense, compsite shells make much more sense.
RE: Buddy club seats -
If you're going for something at that price level, beyond the obvious question of fitment in the chassis, here are a few suggestions.
Try visiting a showroom in your area to try sitting in as many different seats as possible, or alterntively, the local racetrack / autox. Most racers will be happy to let you jump in their cars to try the seat.
This is a price bracket that you can already have seats that carry FIA cert and that's a good thing
Take note of the height of the shoulder harness slots.
This is something that's especially important for tall guys, you'll find that the vast majority of racing seats simply have the shoulder slots too low for comfort and safety purposes, harnesses have to be installed within certain angular requirements to work properly.
If you intend to run the car at track events or autox you'll want a seat that the width at the shoulders is narrower than for a car that will be used primarily on public roads.
The reason is that in a street car you're more likely to require the seat to be more comfortable for cruising while when driving at speed you'll something that holds you in place better so you're not moving around.
A good way to test for correct shoulder width is to sit tight in as if you were strapped in and stretch your arms forward as if you were holding the steering wheel at 9 and 3 and turned it 90 degrees.
In this position your shoulders are narrower than when your arms are straight and that's the point because this is the position you'll be sitting in when your body will see side loads.
The seat that will fit you well is the one that still holds you in properly when you narrow your shoulders as described above, this is the reason for wanting a narrower seat for track / autox use.