I've got an 04 d-cab taco, here's whats working good for me. Boston Acoustics SL60 comps in the stock locations in the front doors, Image Dynamics IDQ10 sub, RF P3001 300wx1 sub amp, RF 200a4 (I think..) bridged to 100x2 for the comps and an Eclipse cd5435 HU. No rear speakers, the location is so bad that IMO they only hurt the sound. I love the truck but it's a very challenging ride to get good sound into.. Let me know if you need any ideas for a sub install, I've got the IDQ behind the driver side back seat but it wasn't an easy box to build.