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!"
>>..before I plop down $ 500 dollars on something like this....
The storm isn't $500. it's $149.99 if you get it from Verizon using a "new every two" discount and $199.99 if you get it by signing up for a new 2 year contract.