Yep both of these are really good. Usually i will find a wallpaper that just looks cool with my render and then ill use photoshop to blend it. Other times i don't use a background at all. And sometimes if i love a stock and want to use it but i hate using stocks i will quickly render the character in the stock in real time and just duplicate the render part of the layer only and then work from there.
Hope this helped. ^^
P.S. I don't like hongfire anymore... -.- I got bored and wanted to try one of these "eroge" games i saw on welcome to the nhk but when i downloaded one from hongfire all i got were images and no game file.... Fail. :S