It depends on the model. I've had a cheap plasticky Dell, but it was cheap. The XPS 15 has an aluminum case and feels more up market. I expect a Latitude will have a higher quality plastic case.Maybe, but I think the (other, older model) Dells I had always felt a little like the plastic would crack if I looked at them wrong (perhaps I should have said "design and build quality"). Whereas I think the budget Yorkie has could stretch to something more in the "Ultrabook" space, with the build quality to go with it.
I have it in a clear plastic case for a bit more protection https://www.amazon.co.uk/mCover-Shell-Precision-Laptop-Computer/dp/B08HKN5HYQ
This 5530 from the Dell Outlet from the Dell Outlet is £1093.99 with a 15% discount code. It is the same specification as the "£1190" one on the main Dell which ends up at £1,449.50, both with the 3 years ProSupport and Next Business Day Support.
Looking at the specification for those, the screen brightness isn't great (250 nits), so it might be difficult to view in direct sunlight. Personally, I prefer to have a keyboard without a numeric keypad, so the enter and cursor keys are at the edge of the keyboard.