best bang for your buck? subwoofer discussion.

so Ive been looking around lately and got to thinking. there are so many different brands and kinds of car subwoofers on the market today. i come to think about what's the actuall best bang for your buck? there's so many brands like pioneer JL audio kicker rockford fosgate JBL Fi audio JVC sony xplod and so many more. i come to start this discussion on whats the best 12" woofer that you know of within the $50 price range. so far ive found a few lanzar woofers and a few pioneers as well as something called O2 audio "oxygen audio" woofers within the $50 range. there's not a whole lot of information available that Ive found at this time. please share your personal experience with cheaper woofers that are good or even bad and the price you paid. what you would and would not recommend. here are a few links ive found around shopping online of what im interested in and look good. http://www.amazon.com/Brand-Quart-Onx304-Watt-Subwoofer/dp/B0054ID3V6/ref=sr_1_22?s=electronics&ie=UTF8&qid=1314378044&sr=1-22 is somthing called a MB Quart subwoofer for about $50
 this ais a pioneer woofer that also looks promising http://www.amazon.com/Pioneer-TS-W303R-12-4-Ohm-Subwoofer/dp/B002KOERJE/ref=sr_1_1?s=electronics&ie=UTF8&qid=1314306067&sr=1-1

Product Features

• Features 12-Inch 4-ohm subwoofer
• Injection-molded polypropylene and paper composite cone with urethane surround
• Power range: 50-250 watts RMS (1,200 watts peak power)
• Sensitivity: 95 dB
• Mounting depth: 5-1/4-Inch

MB Quart 12" woofer

                                                              TECH- DETAILS:            
                   Brand New MB QUART ONX304 12" 800 Watt Peak 400 Watt RMS 4 Ohm ONYX Series  Car Subwoofer Features: * ONYX Series 12" Car Subwoofer * Illuminating ONYX Logo * Gloss Black Polypropylene Cone * NBR Rubber Surround * Red Nomex Spider * Spade Style Speaker Terminals * High Energy Magnet * Heat-Dispersing Vented Pole Plate * Anti-Resonant ABS Magnet Cover