First, let me apologize for Yet Another Framework Question. But I think this is different enough from the usual "What framework should I choose?" to warrant it.

Here's my situation: For the past year I've been using a custom framework. It's been used on everything from small CMS's to larger sites and even a mid sized social network. It's worked great but I now see its limitations. So, I've decided to switch to a 3rd party framework. The simpler frameworks (CI, Kohana, Cake) seem too inflexible from what I've heard - so this led me towards ZF. But, I've also heard that ZF may be too flexible and thus hard to work with. What further complicates this is that I'm looking for a one-size-fits-all solution; I need a setup that works on small projects to very large projects. I am the main developer, but I need my partner to eventually be able to learn the system and help with the less complicated programming tasks. 

I've researched Doctrine and I love it. So I'm leaning towards Symfony (with Doctrine) as the main framework with ZF to fill in the gaps. Plus, I need the ability to add my own pieces to this platform parallel to any 3rd party libraries. I hope this will provide me with a solid, extensible platform, as we really can't afford to be switching out frameworks every few projects.

I'm looking for advice from others who have been in the same situation as I am in now. Any advice would be greatly appreciated.

**Edit: I've posted my solution below in hopes of helping other people in the same situation**