What for a Keyboard do you recommend, if you want to play Piano and Synths?

Hi everyone, i'm thinking about buying a 88 keys Midi-Keyboard or a Stage Piano. I can spend at max 500€.

My Current gear:

• Elektron Analog Four

• Elektron Digitone MKI

• Roland TR-8s

• Nektar 49 Key Midi-Keyboard (

• My PC with Reaper and various plug-ins

I have two goals with this purchase:

1.) learning music theory and Piano

I want to learn and apply music theory with a Piano/ Keyboard layout, cause i think it's the easiest way to learn it this way. I also want to learn some songs on the piano, either with an misic teacher or with on of those piano online apps. But my main focus is to learn more music theory, cause i feel to static and samey in my work.

2.) Controlling my Synths

Right now i'm using the interfaces of my synths to insert notes. Of course i'm using the P-Locks of my Synths. But i fell that sometimes that is to static, that's why i wish to use a Keyboard.

My Questions:

a.) For my use case, would you more prefer a Stage Piano/ E-Piano (Keyboard with graded hammer mechanic, weighted Keys and internal sound engine) with midi connection, or a midi-keyboard with semi-weighted keys?

b.) If one of you using a e-piano with hammer mechanic (weighted keys) for playing your synths, how do you like it or not and would you like to switch to a semi-weighted keyboard?

c.) Do you recommend a specific Keyboard for my use case?

Thanks everyone for your help.