There's no blurry text problem -- Mac has a "respect the font design" look, Windows has a "crude text" problem, and Linux is somewhere in between.

That said, a retina display totally changes everything. No "blurry" and no-crude. Just as reading a finely printed book. You wont want to go back to a low DPI monitor after a week of using a retina.

As for using Ubuntu for development inside OS X, that's actually the best of both worlds. You have a stable desktop system, and you can have arbitrary development environments for every job (assuming you use a VM), that are just like the target environment (assuming you deploy on Linux).

I'd also suggest trying Vagrant, if you don't use it already.

Yep, I know the Mac's text looks blurrier:

Link for anybody else interested: http://www.codinghorror.com/blog/2007/06/font-rendering-resp... (linked articles are good too)

OK, I see why a downvoter downvoted it. I meant to write:

"Yep, I know why the Mac's text looks blurrier" i.e., I meant to agree with 'coldtea' and add to the discussion.

The way I've written it now makes it sound like I'm disagreeing. Anyway, the link above should be useful to future readers.