May want to go with CroMo rails, although I'm 196 lbs and ride Ti railed saddles on almost all my bikes (9). I have approx. 12 saddles due to your mentioned comment of trial and error....................where most fell into the error side.

Riding a Bontgrager Inform RXL now and seem to like it on one bike and believe it or not a Pinnerello Leopard saddle on my pedal force RS2 which I find a bit small but great. Fizik makes extremely high quality saddles which most people like.