Definitely Yamaha.
We have Clavs at work and they are far nicer to play than the other makes - still not quite the same as a grand in feel (also a Yamaha), but, apart from being a git to move about (stick them on a rug if you have hard floors, as you'll be able to move them without scratching anything), they feel right and can be repaired far more easily than modern ones. It should be possible to fit appliance rollers - that lock - to one that doesn't have castors if you are likely to need to move it frequently. As long as you never grab the keyboard section and drag or lift, though - even the clavs hate that, just less than the cheaper ones that can and do disintegrate, being made of cheap chipboard and that crap that goes on the back of bookcases.
Be careful of the cable that goes from the pedal assembly to the clav (tape it up so it doesn't get caught) and don't stomp on the pedals; they're the most delicate parts. The clav pedal assembly is easy to fix, though, compared to the flimsy plastic bits inside cheaper ones, the cable connectors don't require specialist tools and you aren't stuck with a tiny, hair's thickness cable that's snapped off but is encased in resin, so can't be replaced.
OK, you'll need a power supply, but at least they don't need regular tuning and aren't vulnerable to temperature or humidity changes. And the headphone socket is great for home use.
I do adore old pianos - the wood, the feel of the keys, running my fingers across the strings, but that's an emotional response to the aesthetics, not a musical one.
See if you can bargain for a proper, height adjustable and sturdy piano stool, though - the ones that come as part of the deal are often too flimsy to cope with adult weights or fidgeting children that weigh above 5 stone. And you'll benefit from having a good LED anglepoise lamp, as reading in normal domestic lighting is less than ideal.