sorry to bother y'all with these tedious questions, but i was wondering if you had to choose which speakers to replace (if you could only do 1 set), would it be the 6x9's or the 6-3/4's?

also, would it be wise to get different subwoofers all together and just ignore the 6x9s? do most 6x9's fit in an X depth wise? thanks for your time