If you have an idea of the volume of shooting you'll be doing (grounds being open, deo volente), take that into account. Brands and models known for reliability and longevity didn't get there by instagram posts, but by products that stand up to thousands and thousands of rounds each week, every month, all year. If you just want to shoot the occasional weekend-midday, pick whatever floats your boat and suits the budget. If looking to put in lots of practice and be sure that your guns stands up to every rigour, I'd look for a S/H of a (more) proven design for more or less the same money.
I'm not slating ATA in any way, but I reckon that the price point is in part related to cheaper materials. Could be all mental, but I want to be sure my guns works and keeps going bang every time I point it at a clay. All in all though, whatever gun you buy I'd recommend an adjustable stock for a first O/U, as your ideas of stance, posture and fit may change over time.