Since we share the same body, I thought I ought to pipe in here...

I have the Gore Xenon bibs and the Oxygen short. I love Gore's craftsmanship and the materials they use. Beautiful stuff. My two complaints are that the shorts are generally too long for my tastes (6.5" is perfect for me, 8" is borderline too long) and more importantly the chamois tends to be entirely too large. They make a nice, dense chamois that is well formed in all the right places (particularly on my Xenon shorts) and that is covered with a wonderful fabric that is super comfy even in the heat. The chamois is just overall too big and it does bunch into places it shouldn't and shifts slightly on longer rides/time in the saddle.

I wear a solid medium in Gore shorts though my Oxygen's are larges and are really too big. I did try a small to get a closer fitting chamois and they were just too tight and uncomfortable (I'm generally ok with tighter clothing, so these were WAY too tight). In contrast, my best fitting PI shorts are actually smalls but I can get away with a medium without too much shifting of material.

I really wanted to fall in love with the Gore shorts but it just wasn't meant to be for me. I do love these though (if you are open to other suggestions):

http://www.teamestrogen.com/prodCA_2068.html