I have the Korg NanoKontrol2 and the Arturia Beatstep and added led feedback for the 2 models in vArranger

The nano kontrol is very compact, lightweight and offers a lot of controls

The beatstep adds some features like infinite knobs and internal arpeggiator. big buttons etc.. but not sure if compatible with mainstage, as I had to create a special mode for it in vA