Im not going to argue with you, the component setup will more than likely come out louder, but cleaner is in how it is setup. The Basslink can produce a very nice clean sound with out problem if its not pushed past its limits (which is hard to do as Infinity set it up to optimum specs for the equipment used.

There are alot of variable that are unanswered.....

Is the OP willing to give up the trunk space that a prefab box is going to take up (around 12"x14" unless he goes with a truckstyle box)? Doesnt seem like much (and its not), but why give it up if you dont have to.

Does the OP have an aftermarket headunit? If not, he may be looking at line level converters (depending on amp used). Extra cost. Basslink has high level inputs and comes with the plugs for it. Even if he has an aftermarket HU, could save some money/time by not running RCA's (I dont recommended not using RCA's but its a possibility).

Does the OP really need or want more output than the Basslink in capable of?

And no matter what, he has stated he looking for as stealth or factory looking setup as possible. A prefab box would be a clean install, but is hardly stealth or factory looking. He could glass something in the side trunk wall or spare tire well, but thats not really cost effective for a non-show, DD single 10" setup.