I guess that I'll have to be the voice of dissent here. I understand that it's a matter of personal taste, but I very much prefer the larger voice of a 324 than a 322. I'd suggest that you try one out - side by side if at all possible - before taking the plunge and see what you think. I owned a 322 12 fret for a brief period, and just had a strong preference for the somewhat larger Grand Auditorium tone....
I agree with you, I like the sound of bigger guitars.
However, my brother likes smaller guitars. He swears that while we don't think they're louder, they SEEM louder because they
project better. The way he explained it is that it sounds louder from a distance than a larger-bodied guitar. Whether any of that is true or not, I really couldn't say.