I used a Lansky since I was a kid and they work great. Most knives I'd re profile to do a relief and then sharpen and that takes a while the first time you do it, after that it goes quick.

I have a Gitco diamond one now and like it, more angles than the Lansky.

Just about any stone system will get the job done, the key is to know what your doing and understanding of what you're trying to achieve. There plenty of knife sharpening articles out there that give the basics.