Which sharpening system would you recommend, why, and how much of your preferred kit is "enough" (i.e. base model, vs extra stones, vs super deluxe kit, etc).
I don't know about convex. Probably use a powered leather belt with diamond for all I know.
The reason I went with the Edge Pro is it handles small and thin blades without some clamp thing getting in the way. It is small, light and portable. Easy to put in a drawer or out of site.
Unlike my hand tool woodworking edges with which I write the angle on the blade in magic marker and vary the sharpening angle a degree or two according to the wood I am working (yes it makes a difference). For my knives I know where I want them from experience and just go by behind-the-edge-thickness and then most every thing is sharpened (or reprofiled ) to about what I want by eye and how it worked last time.
So as far as angle it is a rough estimate and I repeated it simply by using the magic marker technique to be sure I am right on the edge when resharpening. You can get an angle cube and use it on the Edge Pro but I don't. One accessory worth getting is the stop collar for the vertical post.
I looked at the Wicked edge but it didn't seem to handle small knives well and conversely long knives are hanging way out there in space and need some kind of support and the support seems questionable as far as flexing.
The Wicked Edge takes twice as many stones and as far as I have seen there is no way to compensate for individual stone wear when working through a progression of stones.
In comparison the area one is sharpening on a long blade on the Edge Pro is very rigidly supported directly below the edge because one shifts a long knife under the area of the Edge Pro that is doing the sharpening.
I have the Chef Knives To Go set up with the Shapton Glass stones in 220, 500, 1000 and 4000.
These work with most alloys. For the high vanadium alloys get the diamond stones according to what kind of edge you like; toothy vs polished. I have my own work around and I won't go into that here.
I like highly polished edges but not perfect mirror because all my knives are users and the perfect mirror gets some scratches in use. Why polished ? I do a lot of push cutting and carving like cuts on harder material.
The Edge Pro creates this level of polish for me with out hardly trying and the edges are, every single one, easily hair whittling by just going through the motions. I NEVER STROP.
What do I mean hair whittling : I pick out a hair while it is still in my arm. I take the edge to it and carve little curls off the hair without severing through it.
Hahaha . . . if I accidentally over do it though as I bring the edge near my arm all the hair pulls them selves out and jump off my arm before the edge gets to 'em.
Boy does my arm look weird then. I try to not over do it but it happens.
Here is the woodworking edges off the Varitas jig shown. I show them because they are easier to photograph.
Here is the equivalent quality of edge but I can't photograph it with my iPod. Sorry.
Seriously great edges though. I couldn't want better ! ! ! !
This is an A2 woodworking edge sharpened on the Varitas brand jig (not for knives but I wish).
The Edge Pro edges look this good and get just as sharp and durable ! ! !
Here is an attempt to photograph the knives (these are old photos)
940-1 in S90V and Para 2 in M4 alloy
Benchmade 710 in M390
Edge Pro Apex. No regrets !