Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
may i ask what TAWS is?and what is TCAS? ill proll google tomorrow but im snuggled in bed mith muh wife........she purrs steada snores.............no much goog in the proverbial sac though....she hisses and snaps when touch..........like real gilrs doo..........................I own the 430 and 530. If I were to suggest only one unit, the GNS530 is the way to go. It has a beautiful screen and TAWS. The unlimited package will allow you to use two 430's, one 430 and one 530, or two 530's together with crossfill, or it will add TCAS to the 530.
You will spend 200 bucks for the whole 430/530 crossfill system.
Whatever you do, I completely recommend them. I just wish they would remake their SN3308 for FSX..