Sounds like you are going to use these for work so I say Brown oil. it will get darker with LP and oil. It will also kill your feet, but once broken in will be lovely. One tip though, if you do get brown oil, be sure to wear super thick socks to minimize blisters. Edit: Just read your last post… build looks good, the picture shows Lace to toe and not plain toe though (you may already know, just making sure). Also looks like a 700 sole.