it feels like you´re looking for that connection to your instrument.
and for me getting a nice synth with keys really scratched that itch!
i decided upon a Nord Lead 2 as it was one on sale for a very reasonable sum at the time… and i must say that i have had some real moments of loosing myself while playing.
i highly recommend it… to further specify the specification i would opt for something with a large keyboard so that you can play freely.