Completely agree with what John said. Learn to use the basic lever first, then branch out. I personally use a 12" Fujan lever, but in hindsight I'd go with the 13". More leverage equals an easier time when dealing with tight pins.
I've tried a bunch of different head angles, but always go back to 10°. I feel it gives me the best control while flexing the pin the least amount. 15° is good too, but I don't care for it. 5° you'll have problems with.
When it's time to try the CyberHammer, I recommend getting the newest model (720?). The 200 series is ok but there's a world of difference between the two. If you're going to make the investment, save a little extra and make up the difference. You won't regret it.
Again, practice and practice and practice before you start buying expensive tools. Master the basics first.