If you need a beach bag get a DA!!! Yay! Just wait 'till you have saved up some money, beach season isn't for a few months. Or could you trade in that Artsy? Or, because I know your Artsy is a DA, go for mono like everyone said. That way it is more year round. Lots of choices, all is not lost.
Actually, if you want a beach bag, get one of those classic LL Bean bags, cream with whatever trim you want, your name embroidered on it and they come in like four sizes. I like the thrid size up, the biggest one is huge. They are durable, washable, stylish and classic and *cheap*.