I know the Legacy grew significantly in 2010, but I'm shocked you had so much issues with your '09 for room. I used a rear facing seat in both my '04 WRX and later in my '10 STI (both are Impreza based). It was tight but it fit, keep in mind I'm 6' tall as well. I will say, the Commander does have more room though.

We are currently paying on both our cars. Once we pay off the STI, I hope to add a 3rd car but it will be something with substantially better fuel economy. Thinking TDI Passat or something. At that time, my wife will get the new car and I will have both the Commander and STI. Like to Autocross the STI and do a 2" lift and bigger tires for the Jeep for some light trail work.