My point about the shipping was that you paid $10-15 to get it to you and will pay that to return it, so you're $25 behind seeing as they don't have a restocking charge. I say $25 behind because if you did reorder it you'd pay the $10-15 once again to get lens #2 to you. Plus, I don't see the US dollar getting any stronger so the price of the lens may go up (wonder if that had anything to do with the lack of Nikon rebates at the end of last year) and cost of transportation is only going to increase.

I use my Sigma 10-20 for a lot of things, one being interiors. Layne Kennedy was the guy who got me hooked on a 20mm lens on a 35mm film SLR. That first image you see was taken with one, and probably on Provia slide film. A lot of his shots might not look like they were taken with a super-wide, but probably more than you might guess - IOW I don't think he over-uses it as a perspective distortion special effect.