Yes, you should.
The HD7084P has been discontinued. An all-channel replacement is the HD8200U which is even bigger has a little more gain.
http://www.winegarddirect.com/pdf/spec_HD7084P.pdf
http://manuals.solidsignal.com/HD8200U_Specs.pdf
The HD7698P looks comparable to the 8200, but it doesn't cover VHF-Low, real channels 2 to 6.
http://www.winegard.com/kbase/uploads/HD7698P.pdf
