I have decided that the refresh will be this Tuesday, May 22nd because that is good for me! Hopefully nothing goes wrong causing me to have to eat these words and much worse, keep waiting!
Given that the new iMacs will mostly likely incorporate Retina display, I'd suggest waiting. I do a lot of editing with FCPX and plan on upgrading when they the announce the new models in June.
Buy now for sure! If the new Mac has what you need, you can always buy another one. They are not that expensive.
Well I am glad I didn't wait now! I have been enjoying my new 27" iMac for almost a month and there was no news at least initially about new iMacs the other day.
I'd say I made a good choice to just go for it. Next time everyone is waiting on a refresh and I am too, I will at least have a nice iMac to be waiting with. I had an old PC before this major upgrade.
I'm waiting they've got to be just around the corner.