well honestly it all comes down to one's pocket and how much one is willing to spend .. a decent SQ setup hmmm you know what bro there are a lot of brands in market , then there are different sort of audio setups including SQ , SPL and SQL .. different stuff available at different rates in our market .. elite stuff is not available anywhere in our country rite now so some people who are willing to pay import that kind of stuff .. then comes custom duties you definitely don't wanna know about it lolz .. in the end everyone have their own likes/dislikes so it totally depends upon your own choice what you want and how much are you willing to spend because sky is the limit in car audio world and I've purchased various sets but still consider myself new in this field there are a lot of BIG audio gurus available here who can help you with anything you want (H) i hope i make myself clear to you 
just to give you some price idea of just one piece of puzzle check below link
Focal utopia 165W-rc
am also selling some stuff here if your interested in anything let me know (best of luck in pursuing ur SQ)
High end sq setup on sale
