ive had various types of aftermarket seats in my car (240sx) and my friend has had one in his 280z, if you take one thing from my post, you get what you pay for in terms of aftermarket seating.
also, PLEASE consider getting a fixed back seat. myself and my friend have bucket seats on the drivers side and stock seats on the passenger side. every time somone else drives my car and i am in the passenger seat, i find myself hating the stock seat. bucket seats are much more supportive, the material is nicer, ect.
also, one thing a lot of people dont know is that it is sidemount bucket seats (all the good ones are side mount) are very simple to recline. takes like 3 minutes to change the angle. with a good bucket seat the padding is easy to remove, making cleaning a breeze. finally, side mount seats can be made to sit much lower than a reclining seat, if headroom is a problem.
cliffsnotes -
bucket seats are more supportive, lighter weight, easier to care for and clean, give more headroom, and still very easy to recline to whatever the desired leanback angle may be. get a bucket seat!