I was going to get a set of Speedplays but I received a pair of Look Keo Classics for my bday. So once they wear out I may try Speedplays.
Previously I had Look 369(?) pedals. The Keo's are smaller and feel pretty nice. Then again, I'm used to Look's and have never had anything else.
Maybe look on craigslist for some used ones if you're worried about the cost of buying pedals you might not want. That way you can resell them and probably get what you paid for them.
Good luck!