600-720 miles a week on average here and been doing this for the past 9 months

. BEfore that it was doing 350 or so miles a week through twisty country roads.
I echo what others say, the M has no problem at all with comuting.In fact it's more of a relaxed cruiser than an 3.0Si is, as they can be quite boomy. The M only sounds louder under hard acceleration so at 70-80mph it's pretty quiet really when crusing.
It's a reason why people should not fear high miles when purchasing. Mine does hardly any stop-start driving, hardly ever in busy cities and is always warmed up under low revs. My 600-720 miles a week at the moment are mostly done on the motorway, although I've started taking a more scenic driving road for the last 10 miles now the summer daylights hours are here

. Motorway miles especially are very light on the mechanicals.
Bought mine on I think 6800 miles, now done 52,000 and only one rear spring replaced so far

. Great car!
Fuel can be costly but I like to think these cars have done quite a lot of their depression already so a high % of the running costs now will be fuel and servicing and repairs. In 10 or so years time even with 100k on them I wouldn't be surprised if they're still worth over £10k.
I'd like to retire mine off to being a second car at some point and use it for summers only but for now will continue to be used daily.
Some people think I'm mad using it daily for the milage I'm covering but IMO it's a mechnical object that does need to be used and I enjoy driving it. And driving 600 or so miles a week including a lot of motorway miles will probably mean it's do 200k miles EASILY before a rebuiild

.