Don't know much about the HHR other than it was GM's late answer to the Chrysler PT Cruiser and maybe it did not catch on because the wave had past. I can recommend a Dodge Magnum--a very sporty looking station wagon type vehicle. I have been driving one for the past 22 months (72,000 and counting) and I love the car. I have moved a Stoner 180, Ideal 55, VMC 110 and a National 9 Pull Cigarette in this car with no problem. The rear door opens very wide and with the back seat down, the flat surface makes loading a machine a breeze. Pad the bumper, lay two pieces of 2" PVC across the back, tip the machine and just roll it right in. I also know that the car is rated to tow a light trailer(1500 lbs I think) but I have not done that.
The Magnum was discontinued in 2008 by Chrysler--mine happens to be a 2008. Everyone that has seen and ridden in my car loves it. I think it did not catch on for two reasons--price point was a bit high and the station wagon stigma. It is rear wheel drive but with the traction control package and ABS I have not had any problems in the Michigan snow and I have driven this car through a couple of severe snow storms. Plus, if you turn the traction contol off you can remember what it was like to drive a rear wheel drive car in the snow and do some great donuts! Mine has the 2.7L V-6 and I get 22-24 mpg all the time. I have gotten up to 28 mpg on the highway if I set the cruise and keep it to 70 mph.
The used prices on this vehicle are in a similar range to the HHR. If you go this route make sure that you get the traction control and ABS. The 3.5L V-6 would be nice from a power standpoint but it is not necessary. The Hemi V-8 is great but way more power than you need in a vehicle like this.
Here are a few shots that I found online.
Tim