Let the hive mind of Engadget get that for you.
"I just switched to Sprint from Verizon about three months ago for the Pre. Then I went for the Hero about a week ago. Now, I miss my hardware keyboard and am thinking about switching to the Moment. I am still able to switch back to Verizon if I want and get the Droid when it arrives. Should I just trade up to the Moment when it comes out, see if I like it, and if not switch to the Droid? Or something else entirely? Help!"
I get agitated when I don't have my phone, because it replaces a lot of things I don't want to carry around on a regular basis (mp3 player, organizer, etc). We'll probably see more of this as smartphone features creep down to the low end phones.