Hi all. I've got the go ahead to buy another lens. I've been using the Canon 1.8 50mm for dark rides and doing o.k., but would love the additional capability of a 1.4 So, all of you with an opinion, if you could have one of these as a choice (mostly for dark ride captures since I can use the 1.8 for portraits) which would you go with and why. I know the 50 will get me closer to the subject as it is tighter than the 30, but what other considerations might there be? I'm using a Canon 40D body. Thanks as always for your thoughts.