Yeah, just reaching, I guess. Time to mull it over some more.
I think lenses are the
last place in which you want to try to economize. Bodies come and bodies go, but good glass can be forever.
So figure out what it is you
really want to do with the lens, weigh the pros and cons of the lenses
that will fulfil your needs (e.g.: weight vs. reach), make your decision
irrespective of cost - within reason (e.g.: No way I'm spending $7k on the lens I think I'd like), and set your sights on it.
If you cheap-out you will almost certainly regret it.
"The bitterness of poor quality remains long after the sweetness of low price is forgotten” – Benjamin Franklin
Personally, I'd again urge you to consider the new Tamron 150-600mm lens. At about $1300 it's close to your stated budget and reviews are universally positive. Even the older version got good reviews:
Tamron 150-600mm (kenrockwell.com).
As I stated, above: If I had my druthers I'd probably have the Canon 400mm DO lens. But $7k for a lens is completely out of the question for me. So, if this hobby sticks I'll probably go for that Tamron lens. Heck, if it's good enough for somebody like Kristofer Rowe I expect it'll be more than sufficient for me
Oh yeah: And you need not worry about cost at the local store. Tamron lenses cost the same at the local store as they do on-line. Unless you buy a non-US version. Then you get no warranty. The Tamron 90mm macro lens I bought, and the 18-400mm lens my wife bought, were each $649 at the local camera store and from every reputable on-line store. So you can go to your favourite local camera store, fondle the lens, and, if you like it, buy it there--knowing you can't legitimately do any better on-line.