I'm in a bit of a quandry about lenses for my D90.... I currently have the kit 18-105, a Sigma 70-300 DG (pretend macro), and a Nikon 50mm F1.8.
I have 2 main aims - a wide angle zoom, and a replacement 300mm. I also have a couple of random lens related questions.
1. Wide angle zoom - 10-20/24mm
I've read 2 contradictory reviews on 10/12-20/24mm lenses - one review was trumpetting the Nikkor 10-24mm F3.5-4.5G ED and the Sigma 10-20 F3.5 EX DC HSM, and not rating the Tamron 10-24 or the Tokina 12-24. The other review loved the Tokina AT-X 12-24 F4 AF Pro DXII, gave a lukewarm review of the Nikkor (its too expensive at £800), and didn't overly rate the Sigma or the Tamron! So the question is, what IS the better lens, and why??
My feeling was that I'd go for the Sigma, but the filter thread is 82mm, and the filters aren't cheap at that size! I'd much rather go for something with a "more standard" 77mm filter thread, and the Nikkor is the tempting one apart from the £600ish price!
2. 70-300mm (or something else?!)
I've always lusted after a Nikkor 70-300VR to replace my cheap and cheerful Sigma, which I've always found to be useable, but lacks contrast at the longer zoom... and its frankly not shiny enough..!

So, on a whim, I've just bought a 70-300VRII off that auction site!
I am aware of the new 55-300VRII and from what I'd seen, the general consensus was to stick to the 70-300 (despite the extra money!) However I've only just found out about the existance of the 28-300VR F3.5! Now I accept that at £800ish, its a lot of money in comparison to the 70-300, BUT, arguably I could sell the 70-300, my 18-105 and a kidney, but the question is.... would it be worth it?? 1 lens covering the vast majority of my general photography needs!
What would I better off with though? The 70-300 I've just bought, or selling the house for the 28-300? is the 28-300 compromised in any major way? Is it just too much money for a lens where you can get the same range with multiple lenses for a lot less money?
3. Random other stuff
Looking on the famous auction site thing, there are a number of sellers in places like Hong Kong selling new lenses for around £100 off UK prices. However, what are pros and cons of this??
There was an old Nikkor 28mm IS(?) shift lens going for around £200. I know nothing about tilt / shift lenses, I wasn't going to buy it, but is it the tilt function that creates the toytown effect on some photos, or the shift function? Just curiosity there!
Anyway, would love to hear your thoughts on this!