Here is a list of themes that offer great design, feature rich and functional flexibility:
Jumpstart – 7 different styles; very flexible theme with lots of features:
Zigzagpress – very up to date design.
Themes at the top of the list are newer and have more features.
Flex Pro – this company has two major themes, each with 4 layout variations:
Themeblvd – this is the company that also makes jumpstart –