My new bike came with a Fizik Vitesse hp. It's a little cushier than I'm used to, but not "squishy", and it's wide in back -- 150 mm. I'm finding it very comfortable.
http://www.westernbikeworks.com/prod...sp?p=FIVHP&i=2
If you're considering a Brooks you might look at Fizik too, they have a number of minimally-padded, non-cutout saddles that are mostly lighter than Brooks (though the non-carbon versions are not exceptionally light, I believe they are still lighter than Brooks). I actually find the Arione comfortable, but it's quite narrow (132mm) -- for an option in between the Arione and the Vitesse, you might look at the Aliante (142mm).