I'm another vote for the Slick Trick's ,they are definately an awsome head .I bought some last season ,and although I never shot a deer with them yet ,they fly better than any of the head's I've used in the past .I've never tried the Waccum's ,so I haven't anything to say about them ,other than I've also heard some good thing's about them.
If you want a decent deal on your Slick Trick's ,there's a guy on www.archerytalk.com in the classified add's under hunting gear or arrow's forum who is selling them for $21.00 .Check them out .

nubo