Jasper - reminds me of a cartoon character... Casper maybe?
Isaiah - I really like this one. Very strong name.
Josiah - will be shortened to Joe.
Noah - very popular these days.
Alexander "Xander" - I prefer Alex as shortened version, really nice name all the same.
James - okay... doesn't do a lot for me.
Nathan - ex was a Nathan. Every Nathan I know is a jerk unfortunately... nice name otherwise.

Good luck!!!