I'm with WV Hunter and Lemoyne on this one.
I bought a 3x10x40 Powderhorn last February ($60.94 with tax and shipping). Seemed like a nice scope. Put it on my X7 for one range session. For some reason it just didn't suit me. I took it off at the end of that session and put the 4X ProDiamond back on.
Maybe it's a size thing, and I tend to favor the simple and short 4X. Anyway, the like new Powderhorn is sitting in my closet in its original box waiting for another try some day. My kids will probably find it there some day when I go to those piney woods in the sky.