I'm going to make a suggestion that will probably make most people cringe... however, bear with me.
If you can find a nice used (or well-priced new) pre-PZD
Tamron AF 28-300mm F3.5-6.3 XR Di LD Aspherical (IF) (quite the mouthful, eh?
), it's well worth a look.
I have one in Minolta AF mount that I use on my Hasselblad HV (Sony A99) from time to time, and it produces really decent results - for a super zoom. It's better than the Tamron 18-250 on APS-C in my view, presumably because the designers were able to limit the wide end to a more realistic focal length. It's not a fast lens, nor the sharpest, and you have to accept chromatic aberrations in high contrast situations (easily resolved in post), but it's capable of taking very nice photos considering the broad focal length range. It's also very light and quite compact. No WR, of course, but no lens of this type has that.
I think I paid about £120 for my lightly-used Minolta AF copy, and aside from a little dust behind the front element (which has no effect on images), it looks and works like a new lens. If you can find one at a sensible price, it's a good piece of kit to have. It won't ever replace good primes or shorter range zoom lenses in the IQ department, but what it does, it does well