I bought some (bibshorts, not full leg tights) from Wiggle and have used them a lot on rides up to about 50-60 miles. I like them a lot. Very comfortable and have held up well. Shipping was pretty quick-I think about 8-10 days.

I bought pretty much the same bibshorts here in U.S. from love2pedal.com - same coolmax pad, same flatlock stitching lycra just a different logo. A little cheaper too. Shipping was fast too. I have seen some coupon codes floating around the web for them too.

Another good value is Nashbar when they are blowing out Santinis. I bought some blowout Adidas but the pad was so thick it was like wearing a diaper and they ran big, that is one brand I will never buy again.