I have to aggree with getting a KME sharpener, they work great and are virtually fool proof.
As far as BH choice, hard to go wrong with the Magnus line, personally I like the Stingers, straight, strong and generally ready to hunt out of the package. Plus, all the Magnus heads have a lifetime warranty, bust one and send it back, they mail you a new one.
The STOS are made by Magnus and are good, strong BH's as well, though I have to disagree about them coming sharp from the factory. I just opened a package purchased last year and they were dismally ground at the factory, all 6 needed some serious elbow grease to get an edge on them. The tips were dismal as well and needed to be reshaped into a cut on contact tanto style. Don't take this as a slam against STOS, I love the design and will be using them a bunch this year. All broadheads should be checked for sharpness when new, even the supposedly pre-sharpened ones.