I hadn't heard of Arlo, but I like it! Arlos was on my short list!
For our boy we have a very short list left:
Jet or Jett. We like Jet, because we're naming him after the gemstone and it's spelled with one "t". We have heard endless cristisim for it. Wouldn't mind feedback either way (though we will probably do what we like at this point, it's still good to know what others will be thinking!
Rory Royce (this name combo would be static).