About a year ago I had to choose Sharpening System for myself. I was not Spyderconut then, but I choose Sharpmaker for several reasons:
1 You do not need water or oil for lubrication, so it keeps area clean
2 It is compact
3 Sharpmaker can handle plain edge, serrated edge (everybody has at least bread knife), full flat ground blades (I talk to few people, who using Lansky, Gatco or DMT and did not get positive answer about capability of these system to hold full flat ground knives).
I am using Sharpmaker for a year and I love it. I watched DVD and first time in my life was able to sharpen a knife shaving sharp. I watched DVD a few times more; learn a few tricks here and on Spyderco forum. It is a great tool and if you get one you will never be disappointed.
Good Luck.