I would definitely look at SUV’s as well.
We’ve done this before – like for like, an SUV will always be worse on fuel because it’s taller, by definition, and hence less aero. And they have less room inside too.
The CLS really is astonishingly massive in the boot area, as well has having big armchair seats in the front and the back, and tons of legroom for both. And it’s got 204bhp and gave me 58mpg on the last M4/A34 trip at 70mph. And it handles really well.
I admit I’m jealous of Doomaniac’s V6 one, but glad I’m not fuelling it currently.