Interesting that the 60D has some sealing. It isn't advertised to have any. The 7D has sealing and a Magnesium alloy body. I'm trying to decide between the 60D, saving up for a bit for the 7D or saving up some more and getting the new 5D. I like the 20D, but at least 50% of my shots aren't focused well and for that reason I don't use it much. I like low-light, nightime and indoor photography, so having a good auto focus is important. From what I've read the 5DIII>7D>60D in that regard.