I recently got a side job migrating a website from shared hosting to a VPS. The site is running on Django + Apache (mod_wsgi) + MySQL. The current host is running CentOS 5.6 (32-bit); should I take advantage of the move to switch to CentOS 6? And given the choice of 32-bit or 64-bit CentOS, should I stick with 32-bit or switch to 64-bit?
(I'm more experienced with development than with sysadmin stuff, hence my question. I also know Debian/Ubuntu much better than CentOS, but I'd like to get familiar with CentOS, and this is a fairly low-complexity setup to get started with.)