Cocoatech recently released Path Finder 6 for OS X. Cocoatech has posted some youtube videos that explain the product. Here is a link to the introductory video.
I'm not sure exactly when it was released (I think today), but it is on sale during its release week for $5 off . . . so for $35. Cocoatech allows you to try the software for 30 days, but don't take too much time if you want to take advantage of the introductory offer. However, if you use Hazel, you may want to be sure the additional functionality of Path Finder is worth the price of admission as there is some overlap between the two products.
In any event, Path Finder is the best of the Finder replacements for OS X, and this upgrade is just about mandatory for any OS X power user. For anyone with a history on the PC, Path Finder is the spiritual descendent Peter Norton's Norton Commander, a DOS file utility that featured a dual pane view that allowed you to see both source and destination folders at the same time; and it included many useful tools.
A Windows app with similar functionalty is Total Commander, and it costs $44, and has no where near the polish of Path Finder. So. Even at full price, you shouldn't feel too put-off by Path Finder's regular price of $40.