For me the EVO is no longer a viable option at all.
In my opinion, the EVO is one of, if not, the most over-rated mobile devices of all time. I am not saying this as an iPhone fanboy, which I am not. I am saying this as someone who has now owned THREE EVOs! I bought the first one on launch day and have had nothing short of a nightmare of a time with problems and waiting for exchanges. I finally decided that enough was enough. Three defective devices was it for me.
The reason that there are none available anywhere is not because it's such a hot item that they can't keep them in stock. The real reason is they are busy fixing all of the inventory before they send out any more lemons. Don't be fooled by EVO fanboys that are so brain-washed they can't see straight. The EVO has issues, LOTS of issues. Unfortunately, it is no iPhone killer, I wish it was.
So for me, Sprint is where I'm staying. That means the next viable option is the EPIC. After that... who knows. It will probably be 2011 before the 1.5GHZ processors drop.