The 300 & Charger as essentially the same thing. Big cars with optional V8 engines that drink fuel if you have a lead foot. They are an outdated rwd design that needs to be hashed over. I am a GM fan. I wanted a CTS & I test drove one recently. It was one sweet ride. Competent handling, spirited 304hp V6, available awd, & nice smooth ride that was firm but not harsh. Not really affordable for me though. Cars are not investments. They decrease in value immediately after you take one home. If your buying new, GM has that 60 day return policy. I can;t tell you anymore than that b/c test drives are hard to describe. All you can do is read up & evaluate these cars on your own.