Ditto not choosing Cohen....
As far as modern goes...I love Ezra and we almost used it as a first name but its one of our ds's middles. Also, Levi (used as a middle), Seth, Micah (too similar to Mike/Michael for my personal taste but its a neat name), Jonah (very popular where I live but I love the sound of it), Ari, Judah, Gideon, Reuben, Isaac....brain freeze thinking of more.
Unusual, well, again, we chose Elihu. Helps that I'm a Phish head so it doubles for anybody in that crowd. ;) Also Lemuel but since I read the Red Tent I cannot get over the "character" of Lemuel.
Elihu, up on Leemor's bed" when I read it. I can't say I am a current Phish head, but spent a significant part of my college years and a bit beyond with the Phish head crowd and going to shows. My SO is still a HUGE Phish head. :)
I really like the name Ari.