I like Joomlashack quite a lot. Not just because of what you'd expect; great themes for Joomla, but because of what you get with the themes.
Right now not only are you getting a great theme in Aqualine Reloaded but you are also getting, for free, SlideShowPro. SlideShowPro is not a Joomla component but a flash component for Joomla.
You can see a demo on the Joomlashack website so I'm not going to waffle on about it.
For under $40 you get the theme with unlimited colour configurations, 100% CSS suckerfish menus, multiple navigation styles, loads of typography and this flash component.
If you don't go and buy this theme today you have no excuses to ever complain that you couldn't get Joomla to do what you wanted it to do.