Anyone know of a Finder replacement?
When it comes to alternatives of Finder, there are two major alternatives.  

First, you have TotalFinder. It looks a lot like the normal Finder, but it can do so much more. You can copy/paste across windows, you can work with tabs or dual screen,... It's my personal favorite. I've been using it for many months now.

The second alternative is PathFinder. I don't have any personal experience with this software, but when I take a look at their website, it has some cool features too.

So, my advice is to check those two options and I can suggest you TotalFinder!