I’ve had a Passat Sport 2.0TDI estate for about 6 months now – the 170bhp version so plenty quick enough for most things. It’s ace – a significant step up from an Octavia in refinement and comfort though not an A4. It’s much bigger than both as well.
We got 2 people + 2 weeks’ stuff + 2 road bikes + 2 MTBs in the back and whanged round France and n+1 kmph last summer, can just get a bike in the boot seats up (my Soul fits but Rush doesn’t without taking the rear mech off). It’ll do a bit over 40mpg driving at, ahem, “Autoroute speeds” and 50 is attainable if not driving like a ****.
Downsides – well, bit of an appetite for front tyres and not so good for on-street parking and manouvering (it’s a big car whatever way you look at it).
Money no object I’d love an A6 3.0 tdi quattro estate (well, an RS6 ideally but A6 3.0tdi and a 911 with the change seems a better idea!), on a smaller budget hard to beat a Mondeo.