Boy names

We found out we are having another boy, and I have been through name lists for the past 2 days. I can't seem to find anything that I love... We have one son already named Bastian Caleb, and I fell in love with the name immediately. In fact, we had that name picked out for 5 years before we finally had him, lol. I was just wondering if anyone has any ideas for names, our son has my husband's exact initials, and hubby likes German names, whereas I am mostly on the fence with them. We are looking for unique without being too hard to spell or pronounce. Please help!