Thanks Phil.
Alex might have to bump the F/4L IS at least one spot up his list, then?
Particularly given his assertion that: "the F/4L's are consistently sharper than the more expensive, heavier F/2.8L's..."
Regardless, I'm happy with the purchase and will give it a bit of a try-out this weekend...to get a feel for its build and features, and to see how it performs.
Cheers, fellas!