You forgot the most important info before anyone can recommend anything, budget?!.

You mentioned the XC70, this ran from 1996-2016, so this covers a price ranging from under £2k to well over £20k. The XC90 starts under £2k but as it is still in production, prices can run to nearly £70k!.

Bear in mind that many modern SUVs don't have any more interior height inside the cabin than an equivalent standard car, mainly because they look higher because the ride height is jacked up a few inches.

That consequently means the vehcile will handle less well, give lower (sometimes considerably) mpg than a similarly sized (interior/boot space) hatch/saloon/estate car and also cost more to buy, especially as they are 'more fashionable' at the moment.

I would ask are you needing a diesel because you either regularly do long trips / do a high annual mileage (but not made up of mainly short trips from cold) and/or regularly lug heavy loads, where the extra mpg on long trips or grunt to haul heavy loads is useful?

As has been said, you are far more likely to source a petrol car in that price bracket (and a newer one, unless its a very sporty model - don't bother) that will stand a better chance of being reliable (engine-wise), as modern petrol cars (aside from a few) are more tollerant of abuse, especially low mileage examples being used for repeated short trips from cold.

A modern diesel can fail very expensively without warning if it was previously driven in an unsympatheic way and/or not really well cared for.

As you're coming from a LandRover, I'd also be wary of buying upper-spec models with wide, low profile (below 50) tyres and big alloys - if you live in a rural community or an area with lots of poorly surfaced roads, then those sort of wheel-tyre combos are potentially dangerous as well as expensive because they are far more likely to fail/get damaged regularly. They also don't work so well in poor weather, wear far quicker and give worse mpg/noise.

I'd still seriously consider an estate car for the space, as you might be pleasantly surprised what you can get for the money. Unlesss you absoluetly need 4x4/4WD because of the road conditions/of-road usage, then stick with 2WD (far cheaper to buy/run) and perhaps consider getting a set of all-season tyres next time you change them, or having a summer/winter set combo.