I have had many digital keyboards in my home studio. Many just sit there and then leave. I was a sax player you see and used the keyboards to input into sequencers, I could not really play. I did try and play, but somehow, the instruments never 'gave back' to me, they did not feel like a living thing. It was not until I bought a Roberts Digital Piano (budget end - £600) that things started to respond to me, I learned a bit of Bach.
I decided to take the plunge and bought a high end digital stage piano, the Roland 700NX.
It took me a good few months to get used to it. I found that my fingers were too weak for the action, but gradually over time, I found this instrument to be FAR more responsive.
Its at this point that it pays off in the playing because your instrument gives back to you, you advance quicker, and sound better, your playing becomes more nuanced and dynamic.
I now understand what a good action is all about, and the Roland certainly delivers, it feels like the action could be on a Steinway in the Festival Hall.
I realise that your on a budget, and you are maybe talking a piece of furniture, but why not try researching a few high end digitals that have recently been replaced by their newer models.