You won't find a WB on hunting bows owned by the likes of Randy Ulmer or Cameron Hanes. Nor with competative shooters on the 3D circuit. They simply can't afford it.
Simply put... Sponsorship. You have to take that into consideration when looking at those type of hunters. Granted they won't shoot junk gear but what they shoot does come into play with their sponsors/employers. When I first got into bow hunting I was trying to pick what a good broad head to use. This was long before internet forums and such. I found that rifling through all the success photos I could at the gun stores, taxidermist, and anywhere else I could I found that there were about 3 broad heads being used in all the photos. I went with one of them and found great success with them myself. I didn't have to spend much money 'trying out' junk broad heads or what not as well many other archery items. Granted everything else came by the way of live and learn till this message forum stuff started to come about... Much easier to research now a days.
Good luck with your choice. If you can see if anyone you know wants to swap rests for a few months to try each one out. Go in 1/2 cost with someone else interested and each test one. Same with drop away. Each has their pro's and con's but like Blacktail53 said they each suite hunters different. I hunt spot and stalk putting myself in weird crawling situations and I like how the WB holds my arrow from clanging around and I don't have to worry about it when I go to draw, read that how bad I might shake from buck fever. Put me on a 3D or target range and I'd prefer a drop away.
Thus far only when I put some helical on the vanes do I get wear. If I shot them straight no wear with a ton of shots. All my testing with my broad heads I haven't found a need for helical vanes. No added benefit thus far with my setup. Next years setup might be different. Who knows. Kind of why I love the game. Ya get to tinker...
cmc