You 2 need to forget the stores and acctually listen to these speakers in a CAR!. If u 2 have forgotten, This is a CAR forum and there's no point comparing speakers installed in a car and ones in a shop.
HiFi shops are QUIET.
Cars are anything BUT.
HiFi stores have speakers in (close to) optimal enclosures.
Cars have SHIT enclosures, unless u go 2 great lengths to make a box in the door, and even still will not come close to the manufacture's enclosure.
HiFi stores have great amps with an almost perfect power supply.
Cars have different amps and batteries in every one. With the motor running there will be more noise in the power lines than ANY power-point.
HiFi stores have great stuff for the house. Some things may be taken and used in the car (eg: paradigm titans) but WILL NOT sound the same once installed.
Cars may have great sounding speakers for small spaces but when put in a lounge room will, once again, sound DIFFERENT.
So stop pointless arguing and compare apples with apples or go sit in some1's car and compare oranges and oranges.
My 2cents.
PS:
Arup, I'm taking the TITANS...... U don't use them, u won't notice.