Don't necessarily wait for a new model phone to come out. Heck, you would be waiting forever.
I took my time rather than wait. I have the HTC Incredible. Why did I get it. It was recommended to me by a friend. But I did not get it without using forums like this to do some research on the various Android phones and also found reviews of the models that Verizon had.
So I think you need to take a couple days at least to do some serious research on the phones you mentioned.
Be sure you take into consideration how you will be using your phone. What one guy likes about a particular phone may not be important to you and vice versa.
Use the forums for each of the phones you are looking at and read, read, read, especially the posts that complain about something. Good place to find out what might be wrong with a phone you may like. Since each of the phones you have mentioned have good points as well as weaknesses you will be able to make a choice of the phone that will do the most things for you.
Finally, get a copy of the phone owners or instruction manual. The HTC Incredible phone manual can be downloaded from their sight. There is also an Android 2.2 user manual on this site:
Download: Official Android 2.2 User Guide - Droid Life: A Droid Community Blog Both of these are in PDF format so you can review them. Don't just review them read them.
Once you have an idea about the phones that you want to look at go to the Verizon store and play with them. I found most Verizon reps have a basic understanding of the phones but no where near what you will find on this site.
Don't be afraid to ask questions of us here on this site. We are here to help you choose a phone and then how to figure it out.
So don't rush out in 5 days to get a new phone, do some thorough research and if you end up going 2 weeks after the upgrade is available so be it. You will get the same deal anyway.
Good luck in your research.