I have a Bitstream 3x and it does what we all want our midi controllers to do (fully assignable faders, knobs, etc.), but with it comes a lot of frustration wrapping your brain around the editor and finding a usable version. I have a WinXP VM on my Mac just for editing my Bitstream…
Honestly, I’m contemplating the Novation Control XL since it fully (and easily) assignable and my Kenton USB Host will give me the DIN ports I need to connect to my Elektrons. I purchased the Kenton USB Host to use with the Midi Fighter Twister. Not a big fan of the Midi Fighter gear, but the encoders can be configured to reset when you click them which is perfect for the Performance pads of the Rtym. I figure the Novation Cont XL will be easier to edit than the bitstream, there’s support, it’s more portable and I didn’t really use any of the other fancy features of the bitstream like the arpeggiator, LFO, etc due to the editor being a bit discouraging.
I contemplated the Novation Zero SL, but they’re a little bulky and I’ve heard stories of them losing their mappings.