I'd prefer 1680x1050 over 1920x1080 any day. 16:9 is only acceptable on tv screens, not on monitors.
While I like 16:10 on monitors better than 16:9, I'll still take 1920x1080 over 1680x1050. It's more screen real-estate and you're ultimately not really loosing anything vertical (actually a small gain) and you're gaining a lot horizontal. 1920x1200 is clearly superior, but I wasn't gonna turn down the great price on my huge monitors.