Some of the more popular Endurance pads are:
However, I really like the durability and performance of these pads:
Wyngz ($200-250 just hose off, quick dry, vented)
The CSI pad offers more support than just foam, gel or felt would. The Wyngz pad is super lightweight and great for warm weather riding. It doesn't sweat up and get heavy, and is really easy to keep clean. You can occasionally find either of these pads used on eBay
at reasonable prices.