I just picked up a nexus 4 about a month ago which is a HUGE upgrade from my evo 3d. I will see what the nexus 5 has to offer but I am extremely happy with the 4. And like some other people have said I will still be able to get some good money for it if I do want to upgrade.
I just sold my evo 3d as well. Nice phone but battery life was laughable I got 2 hours of constant use on the best day. I loved the 3d camera though.