it's a good idea to try a few before spending lots of money on a pair, as fit and comfort vary a lot between different seats; you can also find that things change once you've got them in the car as well, as the seating position/elevation of the subframe can highlight 'problems' you didn't think were there whilst sat in a loose seat.
the Sparco Sprint is a (apparently) a comfortable steel framed seat, although you do really need to look at spending around £300ea (new) on FG(etc) shelled seats before they become really comfortable. a steel framed seat to avoid is the Corbeau Forza - v uncomfortable. all imo
bit of a minefield and easy to spend lots of money without being sure you've found the 'best' seat for you, especially with fixed back compo seats