I own waterstones and oil-stones, but my most-used sharpener is a DMT Aligner Deluxe kit with Extra-coarse (black 220 grit, I purchased this separately), coarse (blue 325 grit), fine (red 600 grit), and Extra-fine (green 1200 grit) hones. The deluxe kit also includes a diamong-rod for serrations. It cost me ~$60 altogether. I use the angle-guide when I want to quickly reset a bevel, otherwise I just free-hand with the holder. The angle guide doesn't do 15-dps very well on narrow blades but it gets close. Free-handing with the hones isn't as easy as with the DMT Dua-Folds (double-sided hones) which can be purchased in a similar 4-hone kit with angle-guide for ~$60. These are compact, light-weight, versatile, provide a plethora of grits (you could easily rebevel an edge with these), are easy to clean (I keep a small toothbrush with the kit) and easy to use. If I had the cash, I'd start over with a couple of Dua-folds in those same 4 grits. I use the kit to sharpen axes, scythes, knives, and straight-razors. To finish convex, I also made my own strop that gets loaded with green compound, but it's not usually used for anything but the razors.
This is a compact set-up. The hones are ~1" wide x 4" long so strokes are many and short for larger blades, and recurves require a lot of work with the rod (DMT used to offer an aligner hone specifically for them, but i can't find one anymore). I may soon purchase a Buck FlipStik Ultra simply for the rounded hone (which provides 3 grits in an even lighter and more compact kit for ~$25). However the curved flip-stik makes less contact with the bevel than a wider flat hone so it is more difficult to free-hand an even bevel. That said, you're more likely to have it on you wherever you may travel. DMT offers shorter, wider credit-card size flexible sharpeners as well for easy travel.
Worksharp offers the "Field Sharpener" with extra-coarse and coarse diamond plates of reasonable size (they call the "coarse" and "fine" but the grit is quite low and cuts deep), also offers a ceramic-rod in 2 grits to give the edge a nicer finish, and a strop than can be loaded with compound to remove burrs. There is enough surface length on these for a decent stroke. There is also a short taper-edge ceramic rod for serrations. ~$30
The Sharpmaker is a crok-stik set-up well designed for high versatility, can handle plain edges or serrations, can use the angle-guide or free-hand the rods, etc. I just wish it offered more grits as-is. You can get a similar set-up from "Smith" brand sharpeners for a lot less but with a bit less versatility.
If you want to spend more, DMT offers some nice double-sided full-size diamond-plates, there are a plethora of SiC and waterstone hones available from various manufacturers, pricey angle-guide systems from KME and WE, the WS Belt-grinder (a portable version of the $30 Harbor-Freight belt grinder

), etc.
Most of my stuff comes from sharpeningsupplies.com, leevalleytools, ebay, or here on the gear-exchange.