Bought a Brooks B-17 2 years ago because it came highly recommended in this forum. It was broken in in about 2 weeks and now it fits like a glove. One of the best purchases I ever made. A B-17 might look a little funky on a Felt but they also make a racing saddle too (Team Pro I think). I bought it from Wallingford Bikes. They offer a 6 month money back guarantee if you don't like it. Can't beat that.
http://www.wallbike.com/Brooks.html