i got mine for $375 including shipping and insurance off ebay. it is one of alpine's top consumer electronics models. Sure they make the F#1 Status Processor unit but $2500 is a bit much for me.
i am using green 215 (kinda blue/green)but ill definitely take a look at 198. maybe GT is a little different?
The four buttons change color. the display is always black/white.
it has 3 sets of rca's front,rear,sub. there is separate sub control that is easily accessed and you can tur it on/off as well as change the phase 180 degrees. if you are using an external amp for regular speakers you can turn off the internal amp to save power and improve quality. it has a cooling fan built in to the unit. right now with the factory speakers the moderate listening level has more response. the music sounds fuller, and crisper, sound i never thought the stock speakers could produce.
Oh an the dash kit is from Metra and was purchased at Circuit City for $14