For larger game, I use the Slick Trick Standard or now since I have acquired the Magnums, these. They are a deadly little 4-blade which is easy to disassemble and sharpen, but locks together very well. I have started to cull out all my old broadheads (hence my earlier post with free toxics) and Slick Tricks, the SGHs, the rubber blunts and these http://www.ebay.com.au/itm/131504141...84.m1436.l2649 , all in 100gn, are the only ones I am keeping. The Stinger Magnus I haven't had opportunity to use yet but I will be using against pigs in the near future.
So depending on what you're hunting, these are the options I would be going for. Unfortunately none are free, but if you like I will ask around and see if any of my contacts is doing a similar clean-out.