okay... the box looks great. but.... that terminal, from Radio Shack... I bought the same one and it was very very bad. It leaks! I covered the back with silicon and could not get it to seal, I eventually had to buy a new terminal cup, which luckily, radioshack has a different terminal that fits the same hole.
hmmm thats dissapointing.. from the inside looking out when i have the terminal in place, i see no light seaping through and it appears to be well sealed. im going to use a tpe of silicon and wood glue as well to attempt to seal it from the inside. hopefully i dont have the same problem =\ but hey, at least they have a different terminal that WORKS and fits the same hole..ill let ya know how it works out.
let me know how you like your 15SE. i have one in a 2.165cuft box right now. i dont knwo what youve had in the past. but you should be happy. however, if you had an avlanche you will miss the longer excursion and lower bass.