My favorite pants for cycling are from Nau, gusseted crotch (aka no seam fold where it hurts), recycled synthetic materials (means they shed water really well and wick sweat). Look like dress pants. I've got lighter (wearever pants... they are awesome...) and medium weight (can't remember the name) and heavier (basically fleece pants that look like dress pants... they even have a faint striping... very snazzy) ones.

However, Nau is going through some reorganization, and won't have anything available until mid october. If you think synthetic pants that look like dress / business pants might be up your ally, you might check out some of the stuff from Patagonia... Specifically I think the following are promising:

1. Sol
2. Byway
3. El Cap

Also, I've considered the MH Matterhorn Convertible as it's the only synthetic convertible I've seen that doesn't have gawd-aweful ugly cargo pockets.