Mid/long range zoom - which one?

I'm thinking about investing in a mid/long range zoom in the 100-400 mm range. I don't think that I need to go longer than 400mm or shorter than around 80mm. It also doesn't need to be super fast. Uses? - all sorts, some wildlife, some landscape.

The Pentax 60-250, which is the one that I would probably opt for if money were no object, is beyond my price range, and I don't think I need something as big as the Sigma 150-500.

What would people suggest? Anything no longer made that I should consider?

Phil

DA 55-300mm, nothing else comes close imo (unless you intend spending serious money)

No longer made : Sigma 100-300mm f4 but expensive and as rare as rocking horse doodaas

If Pentax ever get around to their (road mapped for this year) HD Pentax-DA 135-380mm f/4-5.6 ED [IF] DC WR I'll be considering changing my well used 55 - 300 DA. That will nicely complement my 18 - 135 DA DC WR I have now.

Cost, size and weight preclude the big aperture telephoto options for me as I chose Pentax for a kit that squeezed nicely into a small shoulder bag.

PS Have you entered the AP draw...

link

Have you considered the Sigma 120-400 for £480 at SRS? I'd love this lens myself as the extra 100mm reach would make all the difference both for wildlife and at airshows.

I have a Sigma 135-400mm, a good lens and it cost me £220 a couple of years ago, might be worth having a hunt for one.
To be honest I don't use it, but can't sell it either due to my new years resolution.