D-Mac1,
We really like our Northstar and believe that the company offers a good value and product for the money. The TC-850 is self contained and therefore heavier than the TC-800 since you are towing this may be an issue. For us an inside shower and toilet wasn't worth the weight and extra cost. The TC-800 offers a toilet with a black water holding tank or a shower with a gray water holding tank (you need to jump to the TC-850 for both.)
Our truck is a Dodge 3500, We tow a horse trailer. Due to this extra weight we felt the need to add air bags enough though our camper is a "light weight" non self contained pop-up
Feel free to send me a PM if you want any additional information.