I love mine, get the diesel as the brakes are FAB.
Had the propshaft (now rebuildable with BMW parts) done for £400. loads of room for me and the kids in the back, lots of cubby holes, comfortable.
mines doing about 36 to the gall according to the onboard computer.
check for disk wear as well as propshaft/coupling. service them with fully synthetic oil every 10K (5w 40SAE)
Good point on the discs. Nearly all my driving is country roads, and I have always been a bit hard on cars. I have found that the discs will need replacing with the pads and I've replaced the fronts twice and the rears once in 65,000 miles.