For $40 elegantthemes.com has a huge selection, that's $40 for a year for any theme unlimited DLs AND support. They have really saved my butt on a number of occasions and often let me sell sites priced at 1k which I can customize and turn out fairly quickly.
Check them out, the coding is decent and they are easy to work with. Support is not instant but for the price I hardly expect it to be. Also no auto update via WP, you have to do it manually
I am not affiliated with them in any way.
Anyone else have any good recommendations for low cost professional WP themes?