You will get a lot of opinions on which is better or the type of sound each does but really what it comes down to is the actual design. Sealed is considered to be better in term's of sound quality but a properly built and designed ported box will sound really good and will be louder. If I were in your shoes I would go with a ported design and see what you think. If you aren't happy with it then when you get a little money together you can build a sealed box. I have always used ported but that's because I have only owned subs that were meant to be put into ported enclosures. I think you would be more then happy with any choice you made considering it sound's like you have never owned a system or had this nice of a system. Do you have any door speaker's or anything?