It's mostly dependant on your skill/technique and not equipment. I have several stones, Spyderco Sharpmaker (diamond and ultrafine rods too), DMT Aligner, Worksharp Field Sharpener, sandpaper, and have used Lansky Turnbox and Worksharps powered sharpener. I can tell you there is no best between them all, they all have advantages and disadvantages.
I can tell you the easiest one I have used thus far has been the worksharp, and I use easy very loosely as there is a learning curve still and you will need to practice with it a bit as it is extreamly easy to damage knives on it when you first start so we usually reccommend starting with junk knives. This is due to how aggressive it is, it makes it very easy to round/damage tips and remove far too much steel while sharpening. But due to the aggressive nature I find it's far easier to fully apex the blade and reprofile it which takes almost no time.
The Sharpmaker and Turnbox are among my favorites but even with diamonds they lack anything truely agressive to make reprofile work easy which should be done to match the bevels to the rods angles you use while sharpening for the first time. Same is true of all guided setups you should reprofile it to match the guided sharpener angles. That lack of predefined angles is one of the main benefits of freehand you can just match the existing bevel and just touch it up from the very start and not worry about it.
It's mainly all about skill and preference on what you want to use and what will work best for YOU. Just don't get caught up in how high grit something can get as all the grit does is change the end result in finish, a more coarse grit causes a more agressive/toothy finish and can leave something which can be thought of as micro serrations and work better in slicing applications. A knife finished at a higher grit is more polished/refined and work better for push cutting applications. When they are both fully apexed, burr free and free of defects they are both equally sharp but in different ways if all other things are equal. And truth be told most people won't notice a difference unless told most likely. I highly reccommend searching for past topics on this as it comes up a lot and you get a far better feel for what will work for you after doing a little research on what you think they work best for you and asking questions on it. This way we can better help you instead of making random suggestions.
Here are a few things to look at. Spyderco Sharpmaker, DMT Aligner, Lansky Turnbox, Lansky (guided sharpener), Gatco, Worksharp (check out most of their line of sharpeners), Edgepro, Wicked Edge, KME, sandpaper (scary sharp method), Washboard,and I would highly reccommend either a Norton India or Crystolon stone as a first stone if you wanted to freehand.