Alright guys, I've reached an impasse. I'm getting a deal on a 24-105L for $875, full warranty and a chance to check out the lens for any blemishes, etc... Even though I feel like it's a great deal, I'm having some moral issues with parting with so much money. I'm about to go on a couple of great vacations this summer (Costa Rica and Yellowstone) and want to bring a good travel lens and I'm also working on becoming a more serious amateur photographer. I think I need some moral support...anything you can tell me?