Peter - You dispicable creature! I am still trying to get over hyperventilating from buying the 70-200 VRII and you plant THIS wallet flattening seed! Actually I was thinking of getting the TC14 first, to create a 280mm f4 lens for night football for the newspaper I work for. We have more than a couple of fields here in SW Illinois that are illuminated (?) by what I term "darks." When they flip the switch it simply gets darker -- several 250th@f4 with ISO 6400 playing fields. But you make a powerful argument for the 20. We'll see. The 70-200 is so darned sharp I suspect it will easily exceed the older 80-200 f2.8 I shot with last year.