I tried a Brooks on my road bike, but, even with a very thin chamois, it still gave me too much pressure up front. So, I ended up getting the Selle San Marco Glamour Aspide for that bike and putting the Brooks on my commuter, which has a much more upright positioning (the road bike has a few inches drop from the saddle to the handlebars, but the commuter's bars are a couple of inches higher than the saddle).

If you want to try different chamois, go for a triathlon short. They're usually the thinnest.