eBay it. Macs generally have higher resale value than PCs, especially if they're within the current generation as yours is.
The Macs are great children computers, but for serious adults they are worthless.
The only adult thing I can't do on mine with OS X is Windows application development (duh), but I do that through VMWare Fusion. The only other thing I can't do on it with OS X is kid's stuff, all the little kiddie video games the kids play on the PC, especially the ones they got at Christmas that have little controllers with links to appropriate online games (no Mac version for any of them).
So my current experience as a consistent user of both platforms is that the PC is more the kid's machine. Except they prefer the Mac to play chess and use Photo Booth to take pictures of themselves with the built-in camera.
Yes, my pre-adolescent kids like chess. Damn I'm lucky.
The whole cutesy names thing with Mac is very childish. Call a process what it is. The Photo Booth app is a perfect example of what I am say. Who needs a program that takes a picture, allows you to play around with it like being in a fun house and then email to your adolescence friends, I’ll pass.