You could always pick up an M240 (which can be found for about £1000 less than that) and ignore the screen
I've had an M6 for years, and it might just be the last camera I'd part with. It's very nice to use and beautifully made, the meter is useful, my M lenses (a modern ASPH 35/2 and an older 50/1.4) are great, and it's easy to use my screwmount lenses with simple adapters. But perhaps the main reason to get one would be that it encourages you to work in a rather different way to an SLR:
http://digitaljournalist.org/issue9801/nutsandbolts9801.htm
http://digitaljournalist.org/issue0702/pierce.html
The M6 isn't perfect, though. Film loading, while a big step up from the old screwmount cameras, is quirky (you still have to take the baseplate off), and the cleverly engineered canted rewind lever is a bit fiddly. The rangefinder patch can flare out when the light is coming from the wrong angle. The viewfinder is far from ideal for longer focal lengths (it puts me off using a 90mm), the 50mm framelines are rather undersized at normal shooting distances, and the 28mm framelines would be hard to see around if you wear glasses and have the standard 0.72 finder. It seems trickier to keep horizons straight than with an SLR, and polarisers are a pain, as with any rangefinder. It's very expensive but, on the other hand, keeps its value - an M6 that went for £800 just a few years ago could now fetch £1200, and the prices of some of the lenses have nearly doubled over the last decade or so.