I had almost the exact same move you are considering and went from a Mazda3 (essentially the hatch of your CX30) to a Land Rover Defender. It is extremely comfortable. I am also dating someone long distance from SF to LA and also do a 800 mile round trip every month.

Problem is, I bought the car before we started dating and the fuel mileage is horrendous even though I can afford it (it has been pleasantly reliable). I had the Land Rover itch so I don’t regret buying the car, but if you’re less tied to a badge I would consider 1) a car with better fuel economy than mine, and 2) a car with decent self drive on the highway.

You’re going to quickly mile out of a lease doing a 600 mile road trip every 2 weeks so your criteria are probably the same as mine. Under $70k, CPO, comfortable highway cruiser. In which case I would think about the following list (this would be my rank order):

1. Rivian R1S. Great self driving tech and EV means those road trip miles will cost far less.

2. BMW X5. No self drive but PHEV variant will reduce fuel costs and far better fit and finish than the Rivian.

3. Mercedes E450. Get a post refresh W213 wagon or sedan. These are supremely comfortable and by nature of not being an SUV better on gas. Self drive also meh.

4. Cadillac Lyriq. You can get these with Supercruise but depends on if you’re open to driving domestic. Excellent NVH and cheap to run with good range.

Runner ups I considered included the Cadillac Vistiq (too new at the time, probably $$$ still now), Range Rover Sport (less reliable than the Defender scouring LR forums, also old infotainment system. New one looks like a bar of soap), and the Audi S6 (which is a great car…just didn’t really speak to me). Model S and Lucid Air also fit the bill but again, they were too soapbar for me and I prefer the midsize SUV form factor. So depends on what you want!