This post might better fit under the Jr. Audiophile circle, but regardless, each has its own advantage. Usually sealed boxes are smaller, if space is an issue. Ported usually has more extended bass, but some like the sound of a sealed box (thinking that it may respond faster). For the most part, which works best may be dictated by the TS parameters of your woofers. If you could give us a bit more info about your goals and woofers under consideration, we could better guide you.

As far as complexity, it's not that much more effort to cut an extra hole and put a tube in it.