Sometimes when we are so prepared with names, we can tend to get sick of them / over think them. I was this way about the girls name we had picked for DS1, which DH wanted to use if this one was a girl - I was soooo over it!! (luckily this one is another boy) So I totally get it!!

I like Tyson David and Brodie David out of your new list...
Some Ideas:

Conner David
Makai David
Callan David
Mason David
Lucas David
Zade David
Harlan David
Lachlan David
Caleb David
Cohen David
Corbin David