New here got a few audio questions!

Hey

I'm new to car audio, and I have been looking around on the forums, and I decided I want something really simple for my car. I have a 2006 MINI Cooper S, and I am looking to get a simple box and amp, I just want really clean and defined bass.

http://losangeles.craigslist.org/wst/ele/635415308.html

I've been talking to the seller of those JL and Amp for the past few days, and I think I might end up buying them, I most likely will pay around the $250 region. Is there something else I can look into around this price, new or used is okay. I need this to be quickly removable from the car as I do autocross the MINI occasionally.

So a quick breakdown of that setup is

JL 10W3V3 Sub

Pioneer Premier GM-7150M + Pioneer Bass Control Knob

DB Gain Box

Rockford Fosgate 4 guage wiring

Like I said before, will a setup like this be more on the loud side or sound quality side? I am looking for sound quality, and not something really loud. Thanks for your guys help, and I hope to learn more around here, take care!