I have been using a set of Mainstream MSX Avantguard 55 for about a month now. So far I like them quite a lot. The Ortleib design was a little better maybe, but these seem well made and they are water proof (ridden in rain a few times already). Also, they were the same price for a set as the Ortlieb was for one bag.

https://picasaweb.google.com/rsmillb...Jn_q5fEkf-EZw#

http://mainstream-msx.de/stores/cata...roducts_id=120

I found these locally (in Germany), but when I tried to order online (Outerbag-XR) I found that they don't take credit cards, only bank draft. This might be an issue in from the US... there are some on amazon.de however..

scoTt