try this link
http://www.tacotunes.com/----not mine
http://www.cardomain.com/ride/823613-----not mine
I have a 90 toyota pickup regular cab and had boston pro 5.2 in the door running off ads pq10 at 90x2 watts and 2 jl W0 10"(carver amp 120x2) in box behind seat custome box by shop(pretty **** for the $$$ now that I know more about car audio) back in 1991. back then speakers didn't need big wattage, that I know about, nowadays sub require min 300watts up to 1000 watts max
right now I am reworking it and seems endless work, with work, kids and this calfiornia heat, oh catching the upgrade fever delays the project.
I got alpine type R 6.5 in the doors now, with 3/4 mdf baffle(speaker depth is too big) and trying to fit 2 12" id overstock in the back, have prebuilt cheap box trying to make it work behind the seat. And the sub hits pretty good, got my garage door panels shaking or ratteling. The alpine sounds okay for the price but I think I am going back to Boston pro, need to deaden doors and back panels.
so I would say only get front components and find out what your door depth is beforing it starts hitting the window rails. my depth on the door was less than
1.5", added 3/4 baffle and put spacer on the window rail bolt(no power window) to move it back further for fitting my apline which is 2.75" depth.
working with toyota truck, car door depth is problem and ideal location for tweeter is problem, but maybe newer tacoma truck is better.
I think there is a
ebay seller name taco something who specialize in selling speaker adapter so you can fit better speakers or components location.
will put up link later if I can find it.
just get a good componet upfront, good component amp, maybe 1 or 2 12" or 10" in box with mono amp. Then the trick is to balance the sound so that sub doesn't overtake the fronts and all you hear is booming bass. It depends if you want sq or spl sound.
OH, it never fails you always start out think you want cheap good system and before you know it you end up later buying $$$ quality stuff, which explains my selection in alpine type R, now I am stuck with it for the moment.