I am wanting to buy the wife a wide angle lens for her Nikon D5000 for Xmas.
Have been doing a bit of reading and all points to the Nikon AF-S DX Nikkor 10-24mm f3.5-4.5G ED lens. I am not right into, so don't really understand spec and jargon but she wants to get into photography a bit more seriously. I was looking at other lens as well and saw the Nikon Mount Sigma 8-16mm F4.5-5.6 DC HSM lens and reading on Ken Rockwell site he said this was alright as well.
What i was wondering what way should I go if anyone can help please.
Current lenses AF-s 35mm 1:1.8G, 18-55 1:3.5-5.6G, 55-200mm 1.4-5.6G ED, 70-300mm 1:4.5-5.6G ED and SB800

Thanks