Choosing the right wide angle lens

[Potatoes]

Hello, I am new to photography, and i need some help from more experienced people. I want to do architecural photography (Mostly in tight spaces), and also some landscapes.
I have Nikon d3300 camera, and I figured that i need a wide angle lens for those types of photos.
Im on a pretty tight buget, and as for my first wide angle lens im thinking about
Sigma 10-20mm F4-5.6 EX DC HSM or Sigma 10-20mm F3.5 EX DC HSM. These lenses are something that i look for, but i cant choose between them. They are really similar, but some people say that F3.5 version is a bit blurry on the edges. Could someone help me choose?
Or tell me which one is better suited for my needs? Or give me some other alternatives?
Thank you for the help.
Sorry for my bad english.

 

[eriksen]

You can find much good information about any lenses on Youtube. Search for a specific lens or "best wide lens" and you can listen to their opinion and see images at the same time.

 

[Designer]

Welcome! Your English is fine. I don't have experience with either lens, but you might be able to judge for yourself by going to PixelPeepers and find the lens and camera combo that you are considering.

pixelpeepers