I'd go with Odyn Son. Unless the procs have changed recently (I've been away from the game for a month or so), the OS proc is still one of the strongest in game. The weapon has also higher base damage than TF, so skills hit harder using OS. Unless having a fast weapon is of paramount importance, OS is pretty close to best all around weapon in game.
lowl1fe - I don't have either TF or SoH, but I have done quite extensive reading on monk weapons - just to make sure you know to take this with a grain of salt. I would go with OS in main hand and SoH off hand. The two of them have the strongest procs even with fix the SoH got (SoH one even scales with lightning and - presumably - elite damage). OS in main hand because some of the skills take the damage from main hand weapon. The damage taken is the weapons damage range, not the DPS written in BIG, and OS has higher damage. Most of the skills alternate between weapons, so it's really not a very big deal either way.
I'm currently playing holy oriented build with OS in offhand because the damage from the proc is pretty sick. At least one theorycrafter tasting OS says it doesn't scale with lightning, and I'm inclined to believe, since mine crits for 12M with no other +lightning dmg than the weapons own 15% (yah, min roll). OS proc is especially strong for single target dmg because the chain hits the boss for all 3 jumps if there are no other mobs around, and usually the single target damage is the thing that we lack the most. OP, try using OS for one rift instead of WKL without even rolling anything on it, and see if there is noticeable difference anywhere. My bet is on OS feeling better even without chd gem (which you'll definately want to get there).
Fulminator on the other hand has the crappiest of procs of all proc weapons. The damage difference is pretty big compared to that WKL, so can't say 100% which is better, but personally I'd go with WKL until you'll find a good Shard of Hate to go with that OS.