Oh yeah, I forgot the alternator - 253 amp GM 3500 series ** option, $115 on E-bay.
I won't ever be going (much) bigger, I haul tools and materials all the time (am a General Contractor, and install for Lowe's). I might upgrade my Powerbass 10's and my sub amp, but my enclosure is fabbed into the rear quarter panel, I can't squeeze 12's in it. I might upgrade to Massive Audio GTX or TOROX 10's, American Bass XD 10's, or maybe even some Dayton Audio ** DVC 10's. Ideally, I'd like to find the most efficient subs I can find (the Massive GTX's sensitivity is 87.5dB @1w/1m, the TOROX's are 86.5, AB's are 91-92 dB (depends on where you look), while the Daytons have a sensitivity of 90.5 dB). Power wise, the GTX's are 700 rms/1400 max, TOROX's are 1000/2000, the AB's are 450/900, while the Dayton's are 600/1200. Every 3db in sensitivity is equal to double the power applied, so, for example, if the GTX's are being pushed by 500 watts each, theoretically the Dayton's would only need 1/2 of that power to reach the same output. If the same 500 watts is applied to the Dayton's, they should theoretically be 3dB louder. The AB's don't even need the full 500 watts to be "as loud" as the Dayton's, as their sensitivity is higher - which is a good thing, as the RMS on the AB's is 150 watts less than the Dayton's.
And then there is the musicality factor. I don't want my tunes to sound like a tin can being beaten to death, nor like loud farts from a greased hippopotamus. I like my bass loud, but to smack me in the back of the head, like I got hit with a flat shovel. I don't want to even consider doing hairtricks, SPL ain't my thing - loud is good, but being accurate is better. I'd much rather only hit 130dB and sound great vs hitting 150dB and having my truck sound like my ex-girlfriend queefing.
https://www.ebay.com/itm/Massive-Audio-GTX-104-1400-Watts-10-Dual-4-Ohm-Car-Audio-Subwoofer-New/182253352145?ssPageName=STRK:MEBIDX:IT&_trksid=p2055119.m1438.l2649 -
$74 each
https://www.ebay.com/itm/Massive-Audio-TOROX104-10-2000w-Dual-4-Ohm-Car-Truck-Audio-Subwoofer-Sub/142479025016?ssPageName=STRK:MEBIDX:IT&_trksid=p2055119.m1438.l2649 -
$160 each
https://www.ebay.com/itm/American-Bass-10-Car-Subwoofer-1-900W-Max-4-Ohm-DVC-XD1044/292279544939?ssPageName=STRK:MEBIDX:IT&_trksid=p2055119.m1438.l2649 -
$89 each
https://www.parts-express.com/dayton-audio-rss265ho-44-10-reference-**-dvc-subwoofer--295-463 -
$140 each
