Moment.
For me, I need a physical keyboard. I'm not using my phone like 15 year old kid would where it's my life and I can get good with swype or typing halves of words and letting the phone autocomplete everything. But when I need to send a work email, the keyboard is very intuitive and quick and fun to use. The screen also gets a lot less abuse because it's just for navigation.
I also like that when I slide out the keyboard everybody knows I don't have an iPhone.
Will cost you $100 less upfront and $240 less over two years which is $340. If they lower the price after the EVO comes out it will be even more.
The Moment is built like a tank. My cousin left his on the top of his SUV and took off driving. When he realized what he'd done, he went back and found it strewn all over the road. But all that had happened was that the back cover and battery popped off and the keyboard slid out. There was one tiny scratch on the corner that I couldn't even see at first. I dropped mine at the grocery store and it landed flat on it's back and didn't even wince.
I also like vanilla Android. I think the EVO also doesn't have an LED screen, so the Moment might actually be brighter.
I'm not saying the Moment is a better phone than the EVO because it is not. But the major features the EVO has (higher end specs, HDMI, Hot Spot, 4G) are things that I wouldn't use and the few advantages the Moment has (cheaper price, sturdy construction, physical keyboard, LED screen) are things I take great advantage of.
As a pure toy, nothing will top the EVO. It is also the most likely to see steady Android updates to Gingerbread and beyond. But with Sprint Premier, the new phone cycle is every 12 months, not 24 months, so you're not locked in quite as long as it seems.