Here is my setup:
I have a GATCO Professional. I added the extra fine and ultimate finishing hones. I also added the extra coarse diamond.
I finish with strops loaded with red and white polishing compound.
The pluses of a GATCO.
The GATCO will do 11°, 15°, 16°, 22°, 25°, and 30°.
The GATCO's rods simply pull out from the stone holder and you are ready.
The GATCO with the two finer stones and the stropping provides very sharp edges. I have sharpened every knife I have plus several for the guys at work. I have not had a knife other than a very narrow SAK that I could not sharpen.
I am very pleased with the GATCO. I have a three stone Arkansas set that I have trouble free handing with. I had zero problem with the GATCO right out of the box.
I have read that the Sharpmaker and the VEE stick type sharpeners will not sharpen a dull knife very well. They will maintain a sharp blade but do not excel at going from dull to sharp. They are limited in the angles that you can do.
The Smith's one you linked uses carbide to "set the angle". I d never drag even my cheapest blade through a carbide "sharpener". Nowhere on the Cabela's, Smith's Abrasives, nor in the Smith's catalog I downloaded does it specify what angle you can achieve with it.