We towed an HHR for years...(last year of mfg 2012) and they are great toads. Weighs in at a bit over 3k pounds and seats fold flat for more storage. Seats five comfortably and is good on mileage. Unfortunately ours was a flood casualty several months ago and was totaled. We purchased the Equinox and found it to be excellent so far. Both vehicles needed a fuse pulled to tow, but I wired in a toggle switch for that, so I simply put it in neutral, leave the key in the aux position to unlock the steering and flip the switch.
As for the Blue Ox system, keep in mind each 'system' consists of two parts...the tow bar, that's the part that stays on the coach and the base plate, that's the part that stays on the car. IMHO, the nice thing about the BO baseplates is with the stubs removed, they are mostly hidden. Most tow bars are adaptable to their baseplates. For instance, I have the ReadyBrute tow bar from night shift auto with the BO ends. You can also buy them with Roadmaster ends etc. Easily interchangeable. The advantage of the ReadyBrute system is it incorporates a braking system in the tow bar itself eliminating the need for a Brake Buddy or similar external braking system.....Dennis