Well this is entertaining. I was about to recommend Gill bike pants. I just went to look up the link and found something a bit different.
It turns out Gill actually makes boating gear. They might not even know what a bike is or that their gear works great for a bike. I picked them up at my LBS last year. Thats right I have been using them for a year and had no idea they were not biking gear at all. It certainly explains the two heads look I get every time I mention them.
They work great, are cheap and have all of the articulated knee, velcro tightened ankle goodness you could ever hope for.
http://www.gillmarine.com/section_he...sub_cat_code=6