Don't care about internal sounds or any other feature but the keybed, what is the best controller for like $500-1000

I do not care about a controller having speakers or anything like that, I already have a juno ds 61 with unweighted keys if I need to gig. I want to take my piano learning more seriously (can only practice with the unweighted keyboard and when I play an real acoustic I struggle). I have around $600 but If the only option is like 1k I can deal with it.