I have the EG330c model that I bought around 1998. It's a tank. It goes camping with me every summer here in Oklahoma where the heat and humidty can't be good for a guitar. But it's survived every summer. It plays great (nice action and neck) and everyone who plays it loves how it feels. It sounds good too. I've played many acoustic guitars that sound much worse than mine and I've played many that sound much better. It is what it is... a good mid-level acoustic guitar.
However, I paid around $500 for mine, so I have no idea what the differences are between the EG330c and the EG320c.
I would agree with the Washburn suggestion. I've played some of the cheaper Washburn acoustics and they sound and play surprisingly well. Just keep in mind that acoustic guitars are very much in the category of products in which you get what you pay for. If you want a great sounding acoustic, be prepared to fork over some serious cash.
Hope that helps!