Well, you've got a lot more hooligan in a Monster than you do on a qualified sport bike. I'd say more daily ridability, but that's really a subjective measure. If it's maintenance you're concerned with, why not pick up a S2R? The 2v lumps are easier to work on and its dead reliable. The S4R would be like having the 749's bigger brother, only nekid - and it's still a 4v, water-cooled engine.
How's the triple in the 675? I've heard a lot of good things about the 675.
Otherwise, you can never have too many bikes. Only not enough time to ride them all ... :P
Just because you're not dead doesn't necessarily mean you're living.
1988 Paso 750 º 1997 Monster 750
Twist. Shift. Repeat as necessary.