I think the 5502 is pretty old hat now. It's big & ugly and I haven't seen any recent patches for it. It does do 27.5°W (lacks '8280' though) but uses different channel list file system to the 5402HD- .TBN as opposed to .NDF. I prefer the 5302- again it uses the .TBN channel lists but it's a much tidier box. It also has a good rep. for blind scan.