I'm going to be going on vacation in June (planning on going to Shanghai) and I'm trying to get my kit situation sorted out before I go. I just bought a 7D with the 28-135 kit lens. I also have a 50mm 1.4 While I'd love to acquire a bunch of L glass in the next two months, my budget just won't allow it. I can probably swing a grand to go towards glass before I go. What would you recommend? A wide angle (Canon or otherwise)? A superzoom? 17-55?