To ABS or not, that's the question (or something)
Right - My £0.02
The basic state of a BMW should be to go with ABS, this has to do with non-personal stuff such as resale value, gadget-level (it's a high end bike, so it should have high-end accessories) etc...
But then to the interesting part:
If you're an active rider - say trackdays and/or off road then you should drop ABS as on track and/or gravel you'll be able to brake better than with ABS. Aforementioned rumblestrips is a very good example where it would actually be better to not have ABS (from a stopping distance point of view).
I turn ABS off when I ride
my favourite mountain road mainly because it's bumpy and I want the bike to slow down when I squeeze the lever going over the bumps.
I've not had a good chance to venture off road properly, but here at work we have a gravel car-park and if I'm a bit active here and squeeze the brakes with ABS on then it just doesn't slow the bike down - again - it's more active riding, so you're better off without ABS.
However, if you ride in "normal" conditions, such as commuting, dozy mile-after-mile-travelling, goin' to the shops etc, then there's a big chance that ABS will save your (aforementioned) bacon.
This mainly because you'll find yourself in a surprising situation in which you might lock up the front wheel and thus drop the bike and thus get run over by "Fiona in the SUV returning from dopping the kids off at school on her way to get a new perm".
Good thing with ABS is of course that you can turn it off - you can't make non-ABS brakes be ABS-should you ever need to.
Oh, and btw, I activate my ABS on pretty much every journey I make - sometimes deliberately just for kicks.
