I use the aero tech designs shorts. The century short is nice thicker fabric and the chamois is pretty comfortable.

The top shelf short is $10 less, chamois feels just as good or maybe better than the century short but the fabric not as thick.

But both are good for the price. I used to use nothing but PI Ultra Sensor and one lower end model (? model but about $60) but imo, they are a total disappointment now, especially for the $130+.

I'm 260'ish and have no problems with the shorts doing 50-100 mile rides (Terry Fly saddle).

Claim 3mm thickness.

http://www.aerotechdesigns.com/mececyshthpa.html