Having hunted the wild turkey since the mide 80's I've seen many different types of calls. Heck my first diaphram call was an old double reed from Kelly Calls. I think it's all about personal preference. Your ear might be a bit different from the next guy so it's all up to what you want to try. In the last few years I've been using HS Strut diaphrams and Knight N Hale friction calls. Mr. Longbeard could care less what brand you are using as long as it sounds genuine to him, he is a happy man. My suggestion is to buy a few different brands and see what you like. You might put one brand of call in your mouth and hate the way it fits while your hunting buddy absolutely loves them. Keep a few of them in a holder and try to get a variety of different friction calls. If you are working birds and they have been hearing the same old call they will wisen up real quick and you will want to switch calling tones, calling sequences, durations and set up locations. Don't waste your money on locator calls either....If that bird wants to gobble off the roost he will do it when he's ready. If they are already on the ground and shut up on you then give it a while...they'll start gobbling again and always keep a sharp eye out on a less dominate bird who's sneaking in quietly.

Best of luck to you this Season,
Mack