I'm in the same boat right now. I know there are "better" Android phones out there, but I'm not sure if I'll miss any of the things Eris can't do. Or if I'll be upset later when all the other phones are getting upgrades and the Eris isn't. I'm probably going to go with the Eris, though, for a couple reasons. 1) I'm freaking broke, and with the buy one get one free deal, my husband can get a new phone, too. 2) I've held both the Eris and the Incredible and I know if my 9 month old gets his hands on the Inc, it's doomed. The Eris seems a bit more hardy. 3) If I get the Eris for cheap now, I'll feel less bad about replacing it in a year or so when something really awesome comes out.
By the way, when I asked a Verizon CSR if the Eris would still be around in July when I get my discount, she said they're still getting shipments of them and it should be available. So I'm not sure what to make of the EOL talk...