rulnacco
Subscriber
I'm perfectly happy to have the conversation drift. These things help me understand how others view and use their own systems and their lens choices...
Sorry to have taken it a bit off-topic. But if you ever do go digital, it looks like your 60 will still be very useful in terms of focal length--and should still deliver plenty of sharpness and image quality. But yes, based on what you said, I think you will find that your decision to use the SWC, the 60, and the 150 (or 180--although the 150 is more "field-ready") is a very good choice in terms of range of coverage, lens quality (under field conditions), and ergonomics. I'm not sure you'd *need* to add any other lenses to your carry-around kit. The 100 does fit rather neatly in the middle, and of course has the legendary reputation--but I'm not sure how often you'd use it versus just carrying the 60 and 150 and zooming with your feet. (Personally, I think if I had the 60, I'd hardly ever use the 80, so that would rule that lens out, too.)
As for the 250? I'm not sure that's one I'd carry along if you're looking to travel light; not only is the lens pretty big, but I'd think you'd almost have to use it on a tripod given its length and limited maximum shutter speed. I know common wisdom says you're okay shooting at 1/focal length, but I'm betting that at 1/250 or even 1/500, there are going to be times you're going to notice a bit of blur shooting that one hand-held.
Right now, you've got a great kit with 38-60-150. Time to hit the streets and use that gear--and show us what you get!