These shoes:

http://www.rei.com/product/807775

have most of what I want in a shoe. They are 100% synthetic, the insole comes out for quick drying and they are light. I bought size 12 and the pair comes in under 1.5 pounds total weight.

They were the Deal of the Day a while back which reduced the price to under $27 per pair. At $39 they are still reduced quite a bit, however.