I'm still looking for the perfect theme. I like Genesis Themes. I like Appendipity themes (especially for podcasters). I live the Divi theme from Elegant themes. I just discovered the Prostyler which is (pretty much) just as flexible as Divi but less expensive. ProStyler is $47 and you can use it on as many sites as YOU own. If you want to use it on your client's sites it's only an additional $10. There is one “Catch” when you purchase the theme I see where they have a “pro” upgrade that makes it super easy to change your color scheme. There is also a monthly theme club for $27 a month. These include a ton of themes premade (which would save you time), but keep in mind you don't need the theme club.
Here are a couple of videos that show off the features:
Here is a quick video that shows some cool things that speed things up.
I checked their support are on their website, and the theme is getting updated on a regular basis, and they seem to have a ton of videos to help you learn all the bells and whistles that come with the theme.
If you're interested check it out at prostyler.com