I only have second-hand experience from my folk's 2.0, but from lots of information gathering on owner groups, you definitely want to stay away from the 2.2 if it can be helped. They didn't refine the production yet on the earlier models and you'll read tons of regular problems with the EGR cooler failing, turbo failing due to the torque check seal marker flaking into the intake, and unfortunately common catastrophic engine failure if the injectors get blocked and starts making holes in the pistons leading to oil spew, as well as the transmission not being to the standard they are today.
3.2 and 2.0Bi doesn't crop up with anything strikingly common, but there's always things one need to look out for.
Also, their 2.0 is in the process of getting some longevity mods done, hardest part just a matter of finding the right people who *really* know their stuff, and it's been shocking how difficult it seems to be from what I've heard (you won't find two people agreeing on the DPF or intercooler size for example).
Hope that's helpful insight, FlashSA will definitely come in clutch with some first hand experience too