I just moved down to the Washington, DC area to start my PhD and figured if life is going to be too little sleep and too much bad food I ought to do something entertaining. Got a 'cross bike and registered for the Rookie Race at DCCX V! I've been doing road training with some folks, but am really looking forward to the race in a couple weeks.
Prior to the Felt, I'd been riding either a Fuji Sagres with a Brooks B67 on it or a mid-80s Centurion with a B17. Now, I am not about to ruin a Brooks by riding through mud with it. The stock Felt saddle isn't the comfiest, but it isn't the worst either. If I can do 25 miles of road riding on it, should it be OK for 'cross?
Here's the ride, by the way. Nothing too exciting: bone stock.
Most entry level races around here are 30 minutes long, and you're on and off the saddle so much it doesn't count. I would use this one till it gets destroyed unless you are doing really long rides.
Better yet, get a second seatpost and switch the Brooks out on race day for the other one. That way the angle is already perfect and you can have each seatpost marked and just do a quick swap without tedious adjustments to height and angle. I raced on the road for many years and would do that. Only caveat to switching out Brooks day before race is to make sure you measure from center of bottom bracket to top of saddle on both seats/seatpost combinations. If you leave stock seatpost on and just switch the saddle you will have it off on the height quite a bit (my Brooks saddles are about one inch higher overall than a typical Selle Italia type saddle).