The quality of sound is very subjective. ICE sifus will tell you to chuck away the cap ayams and allocate higher budget for more reliable or known stuffs. Personally, I will not risk myself for some cap ayam speakers after experimenting with a number of set ups. On the other hand, the sound quality is a result of a combination of factors which should basically include the HU, amplifiers, speakers, installation and the tuning skills. Some may swear that cables will play a significant role in determing the final results. Do a research on ICE voodoos and you may get what I mean. In short, try to get something that satisfy you within your budget. If possible, get an audition from your installers on a number of set ups before you part with your money. More practically will be attending ICE TTs. But then again, what you got to hear in their car may be different from yours at the end of the day due to various factors again. My motto: "Fuck other's opinions as long you like it".