Hi! I currently shoot with a Tamron 18-250 on a Canon XTi / 400D. I also own a 50mm 1.8 but rarely use it anymore. I live in the city so most of my shots are street shots. I still love to go out onto the country side and take photos of animals / landscapes. Especially animals are a passion of mine (Whether big or little). Now I have the budget of 400. Possible choices: Tamron 10-24mm Tamron 90mm Macro Sigma 10-20mm Which one would you get?