So tonight I briefly brought up my idea where each Service Star on a vehicle unlocks a replacement for that vehicle. Now, obviously they wouldn't operate any differently (in msot cases) then their "Stock" counterpart. But it would add some more colour and progression to this game. Example, Jets would unlock F-16's, Eurofighter Typhoons etc. My idea originally came from wanting a Shilka over a Tunguska - more guns, no Stingers. This does however adversely affect the AA class of vehicles. I also thought it would be cool to have the Wirbelwind from WW2 as an unlock. This could even apply to tanks - Panthers, Cromwells and for the modern era Challengers. Or maybe my favourites the Leopard and Merkava. Chopper wise it's a little iffy. Transports and Scouts are easy as those really haven't evolved a ton since the 50's. But also seeing Landrovers and G-Wagens over HMMV's and things liek that would be cool.