I have a canon 20d and have the cheapo 18-55 kit lens which I never use. I also have the 50mm 1.4 which I love, but it a bit long on my 20d. Just picked up a 70-200 f4L which is amazing. Now that I have a taste for L series, I want a sharp indoor lens that I can use for shooting my baby, etc. Any suggestions? Any cheaper alternatives offered by tamron? I dont want anything that will be redundant to my 70-200. What would be the next logical lens for indoors?