I have an Edge Pro and I have no intention of getting any other "system" in my life. I am pretty old though.
I saw a demo or pictures or advertisement of the Wicked Edge 2 or 3 years ago. It seemed nice but I remember thinking it wasn't doing anything the Edge Pro wouldn't do. What the Edge Pro will do is:
1. Set up to any angle you want between 10 deg. thru 30 deg. per side. You can get lower than 10 with a little trick.
2. Set up to any angle that is already on any knife. This also alows you to determine what the angle is in case someone says to you "Hey, what edge angle is on my knife"? Systems that have "set" angles and won't do this almost require a slight reprofile if the knife edge doesn't match one of the pre-set angles.
3. Ben Dale (inventor of EP) is great with support via email or phone. Check out his instruction videos on http://www.edgeproinc.com
. They also come on a DVD with most of his systems.
4. Sharpen any length blade. You can also sharpen serrated edges but he has a different way to do it than a lot of people. His way works but that is your preference.
5. Re-curve blades are no problem. Slight re-curves can be done with the 1" wide stones that come with it. Severe re-curved blades need the 1/2" stones. I have them and they work great.
6. Ben doesn't really like diamond stones even though he sells a couple. I love diamond stones and DMT has told me that they are working on some to fit in the Edge Pro. Their products are top notch IMO. That reminds me, I need to check with them on when they may be available.
I'm going to stop now. I really like the EP and recommend it over anything I've seen so far but my experience is limited to the EP and DMT aligner systems. I used the aligner for 3 years and liked it but it had a few limitations that the EP doesn't. If money is a concern and you want an EP I'd recommend getthing the one with only two stones. It comes with a 220 and 320 grit stone and is all you need for most jobs. You can get the 120, 600 and 1000 grit later if you want. I usually go from 600 to stropping myself. He also has polish tapes of 2000, 3000 and 6000 grit but I am more comfortable with strops. If you have any questions I haven't covered let me know or better yet email Ben at email@example.com
Chuck is right about this being in off-topic since it isn't dealing with a Spyderco product IMO. It may get moved there.