i agree and dislike the stock seats, but mainly for the fact they have no side bolstering. though, I really dislike the feel of the camaro/TA seats. as far as what you are looking for, there are the big 3 that you can look into: Corbeau, Recaro, and Sparco. these guys are the best in the biz. I will either be getting the sparco torino or the corbeau CR1 seats at some point in the future.
now there are lower cost alternatives. companies like Jegs, APC, Matrix, and a load of other companies make similer style seats. i will pay the extra money for the big 3 though. similer in style and feel, i dont trust them with this kind of safety. the big 3 are all sponcers and USED in the WRC cars, and with that kind of punishment i'll go on the same path. I dont want to chance getting into a crash and have something on the seat break and cause personal injury. so take your pick.
Torinalth