I assume the Max4Live version is just like the real Stages? Not sure if i get “activated by a MIDI note” right.
Eurorack Sequencer with Sliders i know and find interesting (iirc all of them have a quantizer built in):
Malekko Voltage Block
Electro-Music Klee Sequencer
Stillson Hammer Mark 2
Each one comes with a different twist (and prize tag).
Another quite fun combo if yet potis are ok:
One or two Pressure Points + Brains + a sequential switch + quantizer (Penrose for example)
All of the above ideas will including case/power etc. land in the € 700-1,4 range.
But i guess you’re (wisely) not asking for a Eurorack solution?
What was really the fun part of playing with Stages? The sliders? Having a tactile device with a straightforward UI? Being able to change several notes on the fly?
Just stumbled across the Koma Electronik Komplex Sequencer, which actually is a standalone four (!!!) 16-step sequencer plus Quantizer and Midi interface battleship. But yeah just in the price range of going Eurorack. 1/4 of that (price/size/functions) would be it, huh?