I realize that this is an old lens now. But I also occasionally hear that it's still very much worthy of it's "L" reputation. I'm looking for a good zoom lens in this range and have found a couple of these very lenses in a local camera shop, rated around "E" or "E+" for a very reasonable amount. I've also seen samples on Pbase taken with this lens( with much more current cameras), and they look stunning. I shoot with a T2i. What can I expect from this lens and this camera? Is the older "L" technology now a dated thing? Is it something I should avoid at all costs? Or would this lens do just fine for me today? Thanks.