I would have asked, when you come back to us sharing some insights - but here you are!
Whoa, Sigma lenses being better than Nikon one - this will certainly cause a stir!
As to your search for a wide-angle lens, you've certainly read my sad story on the quality of the Sigma 10-20mm here
, but if you exchange it for another copy often enough, you might well get a good one. I finally settled for the Nikon 10.5mm fisheye, which in my opinion is an excellent lens.
How good is the Sigma 30mm at f1.4? Please, post some pics!
Regarding the printer, I finally gave up to get good quality prints at A3 from a shop at below 5EUR. And the price of printing on your Canon Pixma pro 9000 is certainly cheaper than that plus
you get total control over the colors.
Thomas (beware: Nikon-fanboy and moderator!) My Lens Reviews
, My Pictures
, My Photography Blog