CF Framework

So I am trying to decide on making the jump to a framework, but I need a little hand holding. I have viewed a lot of them and these seem to be my prevailing questions. Any help is answering any of these would be appreciated.

Use of code: From all the frameworks, I see them using their own functions and tags inside the documents. So I am wondering if I tried a CFQUERY with a CFSELECT in these documents, would they even work? Does regular CF code work in these frameworks?

DeBugging. I currently have enough of a grasp on my CF that when I hit an error, I can easily track it down. I'm worried that adding a framework is also adding many more lines of code to root through when my application starts going wonky.

Security. I feel like that if I build my application from the ground up then I am going to be in much more control of how secure my pages are. Adding a framework createS a whole lot of unknowns. How can i know that a framework (or a plugin on the framework) will not compromise my system?

I will admit that I'm leaning toward CFWHEELS because it seems to have the most documentation. But am not committed yet.