Hi.Is 300h we bought 3 years ago .Gs450h I purchased n February this year.I was fan of Mercedes but I wanted try something different so that’s why we choose to buy Lexus .And last December I had small accident with my Mercedes so after that I decided to purchased second Lexus .About gs450h I was thinking few years ago and now I said it’s time to buy it and I knew after is 300h I will be happy.even gs450h I it’s for me better than 300h.very comfortable,very fast,and cheap to run.