I have the stock hitch on my Volvo 610 (Suzy Q). Suzy Q pulls a 33 foot toy hauler and had covered 15,000+ miles since April of this year. That mileage covers freeway, back roads, off-road (and one no-road).
Zero issues so far. I'm pretty anal about maintanence and check for frame issues in the regular pre-flight inspections.
I know others argue good points about going to an RV type hitch. For my own needs, I can't justify the replacement and work involved for switching hitches. Others, with a different setup and different driving style / needs, find the RV hitch is a better mix.
You can go stock or after-market. It depends on your own requirements.