well thats really about what you need.. if you want to make some entry level subs loud, with recommended power, you need a bigger box.. with a smaller box you need more Power usually.. some subs you just dont port, and some you dont seal.. its up to you, but id honestly put them in a sealed box for best results and better response. with a ported box you'd have to play around with size and tuning, because it wont be easy to get them to sound as good as they can in a ported box.
Sorry about the confusion....it is just that the parameters of the sub aren't really ideal for a small vented box...if the box is small than the response is really peaky...yeah thats good for a burp box but if you want a smooth response for daily the box is gonna need to be big
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