How about selling your 70-200mm f4 and putting the money together for an f2.8?![]()
Don't know what they go for, and I know it isn't that fast, but have you looked at the 100-400mm L?
24-105 L if you don't mind sacrificing a bit of wideness, for a walkabout.
Or how about a Sigma 70-200 f/2.8 and a 1.4tc? (for aviation and birds) Without the TC you get a nice telephoto range (esp. on a crop body) and fast glass and with the TC you still have a respectable speec (it will become f/4 I think) with even more reach.
That's a very specific amount, Andy!
What about a canon 300mm F4 L IS