My current setup, some eclipse 6.5s in the back and im not sure what kind of speakers are up front, panasonic head unit. i bought the car like this, dream system. you guys ever heard of ORION? there stuff is amazing, their old s**t will outpound most stuff made today, rockford fosgate is not garbage, their amps will pound the s**t out of anything you put on them. now rockford subs are just blah. well ok... here is what i would want for a future dream system.
HU: In dash LCD Flip Screen monitor, not too sure if i would want touch or not.
Speakers: Boston Acoustics, Eclipse, Memphis, What ever picks the vocals up nicely. quality thats for sure.
Amps: Orion 2500D or D5000, or RockFord Fosgate T4000, one of the T's anyway... Memphis has amazing amps too.
Subwoofer(s): RE Audio 12"XXX, 2 of them. or Orion H2 HCCA 12" as well. Treo has good woofers as well, DD has nice woofers too.
Well i guess all you can say is that, you get what you pay for... if i were to go for a budget system i would get something along the line of this:
HU: Clarion Pro Audio
Speakers: Clarion Pro Audio
Amp: Rockford Punch Series
Subwoofer(s): Alpine Type R 12" or 10"