Which box should i build?

[Sugary Monkey]

Im gonna build a box for my 99 Tacoma for 1 10" MA audio sub

I need help choosing between an upfiring box
http://i20.photobucket.com/albums/b233/djadhd/Sub%20Woofer%20Box/Top.jpg

Or a downfiring box
http://i20.photobucket.com/albums/b233/djadhd/Sub%20Woofer%20Box/DownFireing1.jpg

Let me know which one i should build and why.

[AlpineUser]

im guessing its sealed since i dont see a port?

[bhsdriller]

don't have any experience with downfiring but i've heard that that's the best way to do it in trucks

[Sugary Monkey]

im guessing its sealed since i dont see a port?

yes its sealed i don't have any experience adding ports or any thing like that.