Upgrading Sedan Fronts/Rears

[09sedan]

here are the fronts im looking at


Pioneer TS-A1684R 4 way 6.5inch
http://www.sonicelectronix.com/item_...TS-A1684R.html
or
Pioneer TS-A1674R 3 way 6.5inch
http://www.sonicelectronix.com/item_...TS-A1674R.html

for my rears im looking at the

Pioneer TS-A6964R 6x9 3 way
http://www.sonicelectronix.com/item_...TS-A6964R.html
or
Pioneer TS-A6974R 6x9 3 way
http://www.sonicelectronix.com/item_...TS-A6974R.html
or
Pioneer TS-A6983R 6x9 4 way
http://www.sonicelectronix.com/item_...TS-A6983R.html
or
Pioneer TS-A6994R 6x9 5 way
http://www.sonicelectronix.com/item_...TS-A6994R.html


now before your head explodes from all of the almost identical models.. i plan on running a Pioneer DEH-P4700HD.. for now im NOT going to be running a 4 channel amp anytime soon, the speakers will be run off the new head unit, i will most likely put in a 4 channel amp in the future, ( by end of this year or next) , i will also be soundproofing the doors , firewall,trunk of the car as well in the summer.

my question is to any of the sound system gurus on here, is the 10-20$ price difference for the 4 way/5 way speakers worth it? is there a noticeable difference in sound quality or is it all a marketing gimmick, i need help choosing what to put in for my fronts and rears, for bass i have 2 kicker 10inch COMPs powered by a 300 wattrms MTX mono d amp (TC3001) in a custom box, i listen to heavy/thrash/black/death/industrial metal.

which should i choose for my fronts and rears?