A Wicked Edge would be a good choice if you just want to sharpen knives.
With some practice you will be able to get edges of sheer perfection, provided you get all or most of the extra stones, strops, and diamond sprays, and you don't object to you yourself being the engine.
I have used mine in the past (and i still use it once in a while) for getting display grade edges on higher quality knives like Spyderco's, Striders, CRK's, and the odd custom knife.
For me the WE excels in sharpening short to medium sized blades that are absolutely straight, as knives that are just a little bit out of alignment will skew the results.
Same with long and flexible knives, for those an Edge Pro will work better.
Reprofiling jobs can take quite a while (like sometimes many hours per knife), especially if you do highly wear-resistant steels and/or your stones are getting a bit worn.
A Tormek lets you sharpen a whole lot more than just knives with or without various jigs, and i get very sharp edges as well (treetopping/hairwhittling), but they will not look as sharply defined or refined as i get with the WE.
I use mine with a SB-250 Black silicon stone (instead of with the standard grey aluminium oxide stone), which i grade to coarse with a diamond grader for reprofiling jobs and to fine with a double-sided diamond stone for sharpening various kinds of knives (mostly freehand), scissors (with a jig), chisels (with a jig) and a score of other tools that need a sharp edge.
Main advantages to me:
- Reprofiling & sharpening is completely watercooled, so burnt edges will never happen.
- The process is motorized using a very strong industrial motor, so everything will go a lot quicker than with a Wicked Edge.
- The process is completely dust-free since all debris is constantly flushed away by the cooling water into the water basin below the stone (where the metal dust is collected separately by a magnet)
- Over time you will discover new possibilities, like playing with the grading of the stone, using the sides of the stone for sharpening, making your own jigs, etc.
I own and have quite extensive experience with both of these, so if you have more specific questions: fire away.