upgrading system?

the 1000 watt was just a number for my question,  i'm planning on running alittle less, probably somewhere around 400 watts to each sub, i want them to be loud but not to tear themselves apart, also have to be able to get the rest of the system to blend, it was just a theoretical question, but actually if i was to run 1000 watts to the sub adire claims their max rms at 750 watts  400 watts to each coil, so 500 watt to each would be about right, also are memphis crossovers as good as their amps? and i've got a sony md850mp i beleive thats the model number, i know its an 850mp something or other, flip out motorized face and such, i'm just curious if i should upgrade this as well or will it be fine once i upgrade everything else? also are alpine headunits pretty good? what about pioneer head units? also what are some good brands for lcd screens?  

J~

also what is good to use for sound deadening in the car? is the dynamat spray on stuff any good? what about any other brands of spray on, as well as sheets of sound deadner? 

J~

thanks again, i'm just gonna start asking you questions lol, kinda like the forums cause theres so many ideas but on this one you've come up with a nice solution for my car, and a ton of good info to go with it, one last thing i'm curious about and i dunno if anyone will have a good answer for it, i'm currently trying to polish my amp, its an aluminum case  that had a finish on it that i took off and got it shiny, now i actually want to polish all of the fins and flat areas on the top, all the circuits are mounted to the peice i'm polishing, will this hurt them at all? also i'm going to paint in between the fins black will this hurt anything as this amp doesnt usually get that hot its only about 100 to 120 watt amp? 

J~

also what about jl audio amps? are they as good as they seem or just over priced?

J~

after rereading your last post, if i power these subs with say 300 watts apeice they will still hit as hard as 400 watts? pretty cool if thats what your meaning especially since a 600 watt amp is much cheaper than an 800 lol.

J~

600 watt will be just dandy for my needs, i've never heard the break down on what watts actually translates into noise, kinda neat to find out all this stuff, whats the general rule about rms on a sub/speaker vs rms output of an amp? do they need to match or will a 200 watt amp pushing a 400 watt rms sub still translate into good power? basically how much power vs rms on a sub is required to get good sound from that sub?  as for the 15s, which way will yeild the best results in a coupe type car, if i build the enclosure to face the rear trunk area, or if i build it to face them forward?  since i work with fiberglass i'm going to build 2 wood boxes and put fiberglass fronts on them, either pushed forward into the space behind my seats, or facing the trunk lid, with the amp in between them, also i knew a guy who did all his own stereo installs and most of them were pretty good but he claimed that you could not mount an amp upside down because it wouldnt work right anymore, i'm guessing this is a bogus claim but i wanted to know if there could be any truth to it at all.

also i'm planning to run an airride system on my car in the future, do i need to ground the compressors to the same spot as all audio sources or should i make a seperate ground?   thanks in advance to kfr01 and thanks to all the answers i've gotten so far.

J~

i was mainly curious if the compressors grounds would cause a ground loop in the few times that they would happen to kick on the same time the subs were pounding, i guess i could just deal with it lol.  again thanks for all the help, one last question assuming i just want an spl sub, what would be a good sub for high spl numbers?  as well as your thoughts on diamond audio amps, kicker amps, lightning audio amps and planet audio amps and subs :).

J~