Akai and Native Instruments will have the best semi-weighted keys, although NI might be out of your price range, which leaves Akai. I personally use a Nektar and while the keys are not as good as the two previously mentioned, I find them still better than Novation and Arturia.
I really like my Casio CT-S1. It’s not weighted, but still has a nice feel to it. It’s more a keyboard that has midi support vs a dedicated midi focused one, but because of that it’s quite minimal & slimline. Probably around your price range when it’s on sale I would guess. Although I think 61 keys is the smallest, so maybe too wide for your needs.
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