IMO the best way to find out which phone to get is to play with the ones that are available to you, meaning whatever carrier you're on or plan to be on. Go into the store and get some hands on time. Waiting depends on your situation. Do you need a phone now/soon? If not, and you think you might like what's coming, then wait.
I did a brief "hands on" with both the Note and the Gnex (roughly about 5 minutes each). Unless you NEED the extra screen size of the Note I'd recommend the Gnex. The Note was pretty cool, but I can see myself getting tired of having something that large with me at all times. The Gnex is a bit more portable/pocketable and (to me) felt far more comfortable to handle and use.