I think your right Jeff. The box is easy to use, but it requires at least one hand to use.  Same goes for slate.  The mouth calls minimize your movements when the Toms are close.  You can purchase three piece sets with a video pretty cheap. You can practice the mouth calls while driving to work! I would get the slate, the mouth calls and an owl call as well. 

Flint

The Owl call is used to locate Turkey packs from a distance.  When you hoot the turkeys will "shock gobble" and thus give away their location.  It will save you a ton of time by knowing where to set up.  It works from long distances and is only used in locating.  The calls shouldn't set you back too much.  Good luck and keep us updated!

I'm startign off this year too and my plan is to just figure out how to set up.  I'm going with some freinds who have some experience so I am relying on them for the calls.  I figure this year will be a learing year and hopefully get a lucky shot in.

Buckshot, One mistake that I made and I believe a lot of newbies make is they over-work the calls. I you call a couple times and don't hear a bird respond, wait ten miutes and try again. If you have no response then, switch calls. It may be the same type of call ie. a second boxcall. 

I purchased a owl locator call and it sounds really weird.  If you blow to softley on the call it sounds like a duck and a hard call dosen't sound like any owl I've ever heard.

I have the same call from Primos.  I'm not sure it sounds like a owl, but it does get the turkeys to gobble back at night.  Pick up a crow call for a good day time locator turkey call.