If you haven't been involved with sharpening knives in the past you may be SHOCKED at the prices of sharpening tools. I WAS.
Same with knives when I decided to get a nice knife after about 30 years of using $10 knives. Anyway, I will agree with everyone here who recomends the Sharpmaker. I don't have one but understand how it works. I went through a couple of other sharpening systems prior to hearing about a sharpmaker. After using them, understanding how they work and how the Sharpmaker works I believe the Sharpmaker is a very simple to use and effective sharpener for all knives.
In the past 6 years I know I've spent $500, possibly close to $1000 on sharpening systems, stones, etc. This is just hitting the edge of what is available as far as tool selection. I don't even want to try to figure out how much. The only thing gained here is I now know what I like and use. I've gotten rid of a lot of the stuff I bought (sold or gifted). IMO, the sharpmaker is a great start and possibly finish for a sharpening system. It's angles are perfect for almost any application and you don't really need to study and fully comprehend the process. Just follow directions. If you want to go deeper into the sharpening subject you still can. This, of course is just my opinion.
Another thing about serrated edges is they don't need to be razor sharp at EVERY SINGLE SPOT to cut well.