I have AF 2009 plus, and though I don;t particularly like the front end, I have had exactly one problem with it. I emailed support, and had my fix within the about 4-5 hours.
I have to ask, what sp3 issue?
I copied any configurations and any custom drives before I do any upgrades, just in case (I'm an MS sysadmin, it becomes a habit to be extra cautious with MS stuff
I even got amigasys and amikit to install (which was the support issue).
.4, and now .5 should have fixed that problem.
It was a gentle introduction to winuae, which I am eperimentind with directly now.
In hindsight, I probably could have gone with the value edition, but what the hey...