I actually don't really care of the finer dmt diamond stones or the ez lap stones. I gave my ezlaps to a friend and bought the combo dmts.
I use the course on the duo sharp course/extra course dmt
And a 1000 grit shapton
Finally a strop with the green compound
Blade is razer sharp in < 30s if there's no major nicks in the blade. Major nicks mean going to the extra course and grinding it out for a few minutes first.
Every other system I tried just didn't work as well or as fast. The shapton just seems so much faster than the finer diamond stones.
These are some of the good retailers to buy stones from in the US:
One that doesn't carry shapton but has a great house line (Gesshin) - japaneseknifeimports
Don't get a combo. You don't need a fine stone yet. Just get the single medium grit for now. Alternatives to the shapton 1k would include king deluxe 300, naniwa pro/chosera 400.
The second one I have. The fallkniven. It’s good but very very small. It’s only fo touch ups when travelling. You don’t want to do full on sharpening session with that. It’s the size of a matchbox.
At your price point take a Shapton pro 1000 https://www.amazon.com/Kuromaku-Ceramic-Whetstone-Medium-Grit/dp/B001TPFT0G/