Greetings! I'm looking to add one of these wide angle zooms to my bag: - Sigma 10-20/4-5.6 - Tokina 12-24/4 - Tokina 11-16/2.8 I'm torn on which one to get. I'm seeing great results with all three. The two situations I'll most likely use it in are outdoor landscape shots (day and night) and low light/night time conditions (indoor and outdoor)...I prefer not using a flash. Being that I plan on using it in low light/night time conditions, is it a no brainer to go for the 11-16/2.8 lens? If anyone has experience with these three lenses, your input would be greatly appreciated. Thanks in advance!