I had (and still have) a BMW 840Ci as my fun car, which is a 4.4 V8 with 6-speed manual and RWD, great to drive but gets 18 MPG on a good day and I've had it as low as 14 MPG once! So not one to be using regularly or on long runs.
I had a 2.0 Audi for doing my more mundane driving, but even though it was ultra-reliable and cheap to run, it was more suited to driving me insane with the lack of power, and FWD with an open diff was a nightmare to get what little power it produced down on the road. So I was looking for something cheap, but with reasonable power, manual gearbox, decent handling and RWD. Enter the MV6, it ticks all the boxes, and is very well specified too, having just about every toy you'd want (I added the cruise control, electrochromatic mirror and rear blind from the Elite).
I have to be honest and say that I'm a little disappointed with the performance, it's a bit sluggish for a manual 3.0, but then it's a bloody huge 4-door car so shouldn't really complain too much. Lots better than the Audi it replaced, although I could well see myself swapping it for an early 540i if a decent one comes up (IIRC the older ones are 286 BHP and similar weight to the Omega).