Ohhhhhhhhhhhhhhhhh the ole which jig to use question
. The correct answer is that there is NO correct answer!! As with pretty much all aspects of woodworking there is no one right answer. When it comes to putting an edge on steel there are alot of ways to go about it. I've tried several and here are a few thoughts...
First is freehanding. Not using any kind of jig. This is an art form if you ask me. Sharpening freehand takes a great deal of practice and patience. The only real advantage I see to learning to do it this way is if you have a shop where you are constantly 'tweaking' your irons and need to do so regularly. Most hobbyist or even avid woodworkers don't have this kind of need. However, if so inclined to it is a skill most craftsman admire.
Use of a jig. I've tried several over the years and have found the Veritas MK II honing jig system to be the best. Again, this is just a personnel opinion. Veritas® Mk.II Honing Guide - Lee Valley Tools
With ease of setup, repeatability and several optional attachments at affordable pricing its hard to beat for getting your irons ready to sharpen.
I do have and had used a worksharp 3000 for several years with excellent results. I really can't give you a good reason why I stopped using it and went back to using the MK II system. I found setting the primary angles to be tiresome with the 3000. With a limited number of available grits getting down to where I want to be took too much time. I've since learned that there are now several suppliers that have PSA paper that will work on the 3000 and offer many more grits.
Which medium??? Now this is where it gets to be alot of fun. Sandpaper/PSA paper/water stones/wet stones/diamond plates/diamond paste etc, etc...it doesn't seem to end anymore. I pretty much settled in with a modified scary sharp method. I use PSA (adhesive backed) sand paper placed on a 1/4" glass sheet, using a good honing oil to remove the scarf. When I need to change a primary angle I'll use standard wet/dry sandpaper from a local auto parts store. With this set up I've gotten results I'm most pleased with.
Recently I picked up some diamond lapping film to try and have found it to be just outstanding but expensive. Something I think I'll use for touch up work/micro bevels etc.
I gave water stones a run 10-15 yrs ago and found em to be just to messy. Since then advances in technique and the stones themselves have made water stones a favorite among many established wood workers. Just another consideration. However, quality stones can be quite expensive and you do get what you pay for!!!
Diamond plates I've never really give a fair chance. Just couldn't see the investment. If you read around, mostly in a few other wood working forums you will find pro's and cons for just about every system out there.
There really is no right way, just a whole bunch of different approaches to the same end result. And this does not even start getting into the types of steel you'll be attempting to put an edge on. There are several new steels making their way into the market and with that, I'm sure new methods to sharpen them will soon follow. The very best advise I could give you would be to do your homework. Do a good bit of reading and research it will be time well spent. If you have an opportunity to 'give a system a try' prior to investing in it , do so... Ask alot of questions... there are some folks in here who are very well versed in many different aspects of this process...