So here I am, my two nicest lenses being a Canon 28-135mm IS and a 100mm f/2. Perfectly happy, I thought. Then this event comes along (local X-ball tournament, in case your interested in paintball) that my brother is participating in, and I thought it would be fun to rent a 70-200mm f/4 L, kind of the entry level Canon pro lens. By "entry level" of course I mean "gateway drug" for L series lenses. The tournament actually got canceled, so my experience is just long walks outside, taking pictures of cats and butterflies on an overcast morning. Everything about the lens just has me blown away, and I haven't even been able to load and process my pictures yet. The handling, the speed, the robust quality . . . even the fact that the zooming happens completely internally. It's so depressing . . . I think I've purchased my last consumer grade lens. Does anyone else feel this way? I don't mean Canon's magic red rings, I mean pro-grade lenses in general. Is it really such a night and day experience for all involved?