John:
Man that is a gorgeous photo of that 'vette!! And the B&W conversion works far better than I would have expected...if I am around long enough I need to try out B&W conversion on digital. It just never works well when I've tried it so far.
As to your comment about a larger sized lense for "street shooting" or candids...I used a BIGMOS as well as other long glass all the time when I was shooting my 40D...it's simply a matter of using what it gives and one thing a long bit of glass gives is distance which I feel is important when after candid shots. So, I guess I am saying in a way that you have a good chance of getting a truer candid with something long vs. shorter glass up closer where you are more obvious. I have a series I took with my old EF-S 55-250 (granted not a HUGE lense at all) but because I was able to keep distance I could follow this couple for what I feel was a nice natural sequence...but once she saw me shooting you could see her trying not to notice me, which btw turned out to be a nice addition to the sequence...so I guess my point is there is validity to both ideas...
I also agree as well as maybe not about buying the three Ltd's for the price of the 60-250...the thing is, the convenience of a zoom cannot be dismissed, especially if someone is not used to swapping primes quickly. I know it has taken me ages, and I am still not used to the quick & discrete lense swap though it's likely due to not much practice.
No matter at the same time I completely agree with your logic and suggestion...then again...hehehehe....boy, it's sure easy to debate oneself in circles, huh?