I really like the Shebeest triple S shorts - nice fabric, a great chamois, and a bit less pricey than others. I thin they're also a little shorter than other shorts...

http://www.teamestrogen.com/products.asp?pID=25742

They're low rise, but not absurdly so. I rode the MS ride in them last year and was quite comfortable for 80 *very hot* miles. (had a tropical storm the next day).

Good luck!

CA