I think Arq (http://www.haystacksoftware.com/arq/) seems like a particularly useful program. Wasn't aware of it before. I like how they give you control over your backup storage.
I've used Arq for about 4 months now and it has been fantastic. Two features in particular are worth noting: 1. The ability to backup a network drive from my local machine. 2. Rapid timecapsule like backups of the most recently used files.
For dual pane file management goodness, I use MuCommander[1]. It's less Finder-like, but has the Norton Commander nature which has cropped up in many a file manager since then.
Why? I would consider this to be too much stuff if you had a lot of applications duplicating functionality. As it is, though, this seems like a pretty basic working set, very much what I'd call 'practical minimalism'
> Is there any particular reason you use Alfred vs Spotlight?
Edit: I'm not the OP.
Alfred has a few options like find and open which allow you to directly open files. It seems more minimalist than spotlight. You can customize it a little better IMHO (they have a full version that has more features). And finally, you can do google searches and a few other web-related queries directly from alfred. Overall I would highly recommend Alfred.