David, WELCOME my friend! So happy you will be getting a GM vehicle, they have excellent products. I would consider the Impala myself over the G6 with the 4 cylinder, having said that either is an excellent option and the 2.4L Ecotec would have plenty of pep. I own a 2001 Impala wife's current car and love its size and great smooth ride (almost to floaty). I don't know if you have consider a new 2006 Lucerne CX that hasn't been sold yet, you might be able to almost steal one of those, they are an excellent car as well. If I went G6 I would opt for the V6 model or the GT trim, personally. Then again I am not on that tight of a budget when getting a car. The Vibe is a good choice but with options can get VERY pricey, and yes the motor is Toyota and only 1.8L's. The HHR is a great vehicle with excellent under-pinnings but styling is love it or hate. A Torrent is an excellent choice too, as I am kicking around getting a new GXP Torrent in the summer/fall for the wife who wants an SUV and let my son have the Impala. Look for a 2006 that is new on the lot never sold you can really make out pretty good cause it is the 'old' model year and were into MARCH! Good luck shopping hope it was a help, do look a the Lucerne CX they are an excellent car with a great platform and the 3800 has a darn nice power-band. Then again I am biased I drive a 2005 Bonneville SLE with a 3800!