I shoot a TRU FIRE hardcore four finger, and I love it... if these don't fit your hand the right way, your not gonna like it. I would shoot a few.. the Trufire, a truball, a Stan or even a Carter to see which it best for you... I like Stan's too...
I've been shooting an indoor league with a Hardcore Revolution since january and I really like it. Make sure you get the Revolution model, the head swivels 360 degrees.
I'm also trying to learn a hinge release and It's been kinda frustrating lol. I make 3 or 4 good shots then one wayyyyy off. It's a Tru Ball Sweet Spot II 4 finger.
I'll probably hunt with the 4 finger Revolution this coming season. if not, it'll be the Hardcore buckle.