I have this MIDI keyboard: Novation Launchkey 61 (version 1).
Novation released a second MK2 version that is identical to the first version, but with colorful pads.I think all Launchkeys have a function called "In Control"which is prepared for Ableton not for Renoise.I have not been able to operate the buttons that control this function (they are 3) with Renoise. This Launchkey Mini Mk2 have 2 buttons for “In Control”.Basically everything else will work, except these two buttons, which ignore them.The Launchkey line is the brand’s lowest range, and comes in handy for a start or a tight budget.The keys, which is basically the most important, are not of very high quality.
The controls are centered to control 8 tracks, but you can do the mapping to your liking to control other things. Renoise has a lot of things that can be controlled using MIDI Input, and it’s very simple to do.
With the Korg microkey , exist a version MKII, a basic MIDI keyboard, without aditional controls.Personally, I prefer to have some extra buttons, both for the Renoise MIDI Input and the MIDI Input of my LUA tools.
Akay APC key 25 are the pad and controls small, but could be a good compact controller. I have not tried it, but I would have thought it was not very thought for other DAWs, to see if it has exclusive controls for other DAWs that would not work with Renoise. I ignore it.
Nektar Impact GX49 seems like a nice controller, with the minimum equipped.I could not prove it, but I like the keys to have the whole body underneath, not cantilevered.If the controller costs you about 80-100 and is 25 keys, you would make sure the keys were of high quality.
There is a compact keyboard model that I really like, although I have not tried it: Akay MPK Mini mkII (99$)
I quite like what Akay is making lately. If I driver update, it will probably be an Akay…