I suppose I'd be remiss if I didn't mention: I expect that some or all models of the 1000 series phones will go out of production at some point this year. The 2182 is the phone with the longest future lifespan of the current products.
Since Polycom already has a large selection of their own IP phones, it's logical to conclude that they will consolidate the desk phone product line, keeping the newest models. I have a 1022, 1032 and 2182, (screenshot below is from the 2182 phone). The 2182 has a really nice industrial design with more logically-implemented buttons and programmable keys. It also includes both WiFi and Bluetooth built-in, as well as a gigabit Ethernet interface.