You left off an option for "I still haven't made up my damn mind and I'm waffling so much it's making me dizzy. And pissed."
Too wordy?
My real answer is that we are not converting for our current campaign, which will be over in the next couple of months anyway.
I also won't be switching over for the RttToEE game that I'm running about once a month because that group is much more comprised of "casual gamers". Not all of them even have a 3.0 PHB and I'm certainly not going to ask them to buy another one. They have a relatively weak grasp of the rules as it is. No need to make it worse by switching mid-stream.
The real question for me is will I switch when we pick up my Faded Glory campaign again (perhaps a couple months from now) and, like I said, I still don't know.
I'm waffling because while I like some of the rules changes, I'm not sure that it outweighs the fact that I don't like some of the changes, I'll have to spend the money on the new books (which is a fairly minor issue, but I could spend that money on d20 Modern instead) or the fact that I'll have to re-learn all the minor tweaks to the rules and spells (which is a more major issue).
If somebody wants to say something to help me make up my mind, I'm all ears.