I have four different devices at hand, but don't use them all every time:
- M-Audio Keystation 88es which has a mod wheel and a cheesy (and grippy) 60mm assignable fader.
- FaderCtrl unit that was a short-run unit made by a user I found on here. Eight nice 100mm slippery faders.
- Access Virus TI which I use in front-panel CC mode as a sort of dumb synth front panel editor, mostly for EXS and simple soft synths - just so I can have knobs that are labelled ADSR and Filter Cutoff etc., arranged in a familiar layout that resembles a conventional synth front panel, and has painted-on legends for the knobs. The "TI" part of it only works with a solid-gold 3-inch diamond-plated USB cable and a version of MacOS from 1992, so that part of it is a non-starter, and anyway I don't think I've ever used a single sound from the thing.
- Sensel Morph. This thing is a super-high-resolution USB touch pad, similar to the touch pad on a Mac laptop, that you can use with rubber overlays to simulate a Maschine type layout, an MPE music keyboard, a set of faders, an authorized Buchla Thunder emulation, etc., but can also be used without any overlay as a big X-Y pad. In that mode it's perfect for things like NI's Thrill instrument for Kontakt. That's how I most often use it. Build quality and industrial design is absolutely top-shelf - it's about 3mm thick, completely featureless and absolutely solid, and the overlays snap into place with magnets and automatically tell the unit which overlay is in place so that it can call up the correct preset. It's pretty great.