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 actually just bought a Fin, and am currently waiting for it to arrive. You cannot beat $65 a month for 500 minutes and unlimited everything else (except tethering). And please don't say that Verizon should offer the Ocean. They would just cripple the bluetooth and charge extra for email sync, then cut you off when you exceed their (small print) data plan.
In better news, which I don't think is announced yet they have a multiple line plan now. With their 'all-in' plans it was going to run me and my wife $120 for 1k minutes and unlimited data on two phones. Basically it's the cost of the 'all-in' plan then $35 for each additional line. I'm just assuming but I don't think this will apply to the cheap $120 unlimited everything plan.