Ruby on Rails vs. PHP
leonardteo.com
leonardteo.com
And interesting that he points out that finding a dev will be way easier in PHP. I had a non developer friend with a start-up application. He had obviously spoken to a number of bioinformatics (he was a wet lab biologist) who had obviously ranted about the benefits of Python. So he got a Django dev. Then got a second stage of funding, to pay for a junior-ish level dev. Except no Python / Django devs (he asked me) were willing to work for the money he had available. Had he gone with PHP, he would have probably managed to continue, despite everyone probably telling him PHP was a crap language.
Finding a good developer is just as hard in any language, since a good developer will be able to go with whatever language you've got.