Ok, I know most of you will probably say Nexus S (esp if you own one), but I want to know, for people who have had the chance to use both the HTC evo and Nexus S, which one do you prefer? I just got a HTC Evo 4G as a gift, and was told I have 30 days to swap it out for a different phone if I wanted to. I'm pretty happy with the evo, but since it wouldn't cost me any extra to get the Nexus S, I was wondering if it was worth the switch?