The best is the kme. It's a similar system to the wicked edge and edge pro but has the ability to lock the blade in place unlike the edge pro insuring repeatable results. It's also,similar to the lansky. I've used the lansky for years and it will put a mirror edge on a blade if you get the full kit. It's only about $60-70 bucks too.
The KME is about $200 but will go a big step further in the repeatability of sharpening and will make anybody a master sharpener. For the money it's the best out there.
I was looking at the wicked edge ken onion edition but I've done a lot of homework first and found it to be lacking. You really need to check one out first. It will not do every knife. Sure you can take the guides off and free hand but then that defeats the purpose of buying a guided system in the first place. It may be quick but I feel there is better options.
So in my resource for the money the KME is what I have on the way. The wicked edge is the best but costs quite a bit more. Your looking at about $300-500 to get everything you get with the KME. Check them out.
KME