I know this is going to sound crazy but a buddy of mine has a 10" Lightning Audio sub in his s10, hooked up to a 1500watt amp. All LA components, and it will shake your damn eyeballs standing ten feet from it. I believe its all top-of-the-line Lightning Audio, but it sounds so damn good. I dont know if your going for beats or sound quality but it has both.

I hate to admit it but I used to have a Cadillac with 8 10" LA subs in the trunk, Kicker Speakers (which were GREAT) and 2600 watts (3 amps) running it and it was a great system. You could feel the damn thing coming down the road. I know it sounds outlandish but I have pics to prove it.

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1963 Ford F100 - Cummins Swap?
1985 Mercedes 300SD - 210K
1992 Ford Festiva - 92K
2001 Ninja 250 - 8K