Thanks for all the encouragement.
The one problem I find with early morning/late evening photography of any wildlife is that I must bump the ISO from 200 to 400 to keep the shutter speed reasonable (it normally stays at 200 otherwise) and this introduces noise into the equation. I prefer doing as little PP'ing as possible (and don't have the skills).
Chris: With the QC problems in Viet Nam, hopefully (and regretfully) the DA*300 won't be coming along any time soon. Hopefully because it would be sad to see that lens introduced with problems. And regretfully because there is a pent-up demand for longer primes.
I'll be sticking with my FA* anyways. I don't believe any new lens will be able to touch it for IQ.