I like non-vented heads, they should be stronger and they have been quieter in flight for me. I'm not sure if the difference in noise or the theoretical strength difference between vented and non-vented heads is meaningful, but I have bent the blades of vented heads in deer and I like the quiet flight of the solid heads over the buzz of vented.
I haven't noticed any difference in accuracy either, I have Woodsman Elites in 150 grains (vented), and 175 and 250 grains (non-vented) and all are easy to sharpen and fly as well as any head I've ever tried. I've shot the 150gr. and 175gr. out of my compound and they fly and group just as well as the small compound oriented heads like Slick Tricks and Montecs.
The Woodsman Elite or VPA 175 grain head is tough to beat for a three blade in that weight range. The WE is made by VPA, they are basically the same from 175 grains and up except for color. Slight differences in shape with the under 175 grain heads. All of VPAs broadheads are non-vented except for the 100 grainer.