Evening all: I am considering buying the EF 17-40 F4L or the EF 70-200 F4L non IS. Does anyone out there own either of these lenses and can you tell me what the quality is like for both. I believe the 17-40L is weathersealed and the 70-200 is not. I plan on re-stalking my entire kit with new L glass and another body over the next few months and I am just wondering where to start as I am picking up my first new glass tomorrow. I know that Usually a decision on which lens to go with would be dependant on what the photographer prefers shooting however I enjoy shooting just about everthing equally. So basically if anyone can give me an opinion on the two above lenses and add any other favorites within the 1000 dollar range that would be great.