I inquired to my host about installing Opcode (APC, eAccellerator, XCache, WinCache) on my VPS. Basically, the response I got was something to the effect of this:
We are currently discouraging the installation of  OpCode Caching modules for various reasons. Not compatible with VPS containers of less than a level 5. PHP 5.3 does not need APC.
So I'm unsure as to what I should do for my general settings now (page cache, minify, database cache, object cache, browser cache), since I don't have those VPS options.
Should I just disable these since I have PHP 5.3? Or should I keep them enabled, but used the disk enhanced option? Thanks!