Royalty Free Stock Images - iStockPhoto vs stock.xchng vs Dreamstime

For royalty free stock images, I personally prefer Dreamstime. The prices are great (although not as low as they might appear). I used to use iStockPhoto exclusively, and even contribute photos, until their payments and criteria got too ridiculous and their prices for photos went through the roof after beinb bought out by Getty.

While stock.xchng is also good, it still doesn't offer the range or quality of Dreamstime.