I'm looking at upgrading my speakers all the way around, and my head unit after getting the speakers in. The main reason I want a new head unit is to have a bluetooth that functions properly all of the time, and I really don't want to have to go to the dealer 3 times to get them to replace my head unit. I have nice 6x9 pioneer speakers that I thought I'd use in my fronts as that is the "footprint" used, however I see now without a significant amount of work I don't have the time to do, I won't be able to use them. I'm not looking for a killer system, just something that meets all ranges of the music. Been reading about the coax vs component and can't decide what to do. I will likely buy the kicker tweeters for simplicity of install, but I'm very open to options on the other 4 speakers (and possibly adding a powered slim woofer under one of the front seats down the road, but I'd like decent bass without). Not looking to spend a ton but upwards of $150 for a decent set for the front speakers (as I may do the front first and then rear later). I'm not opposed to running components, though I'd probably have to read more on how to install them and the crossovers.
My question really is, if I install the kicker tweeters, will there be an advantage to running components still at that point? I listen to classic rock, country, dub step and some hip hop, so my musical taste varies considerably, just looking for good overall sound. I've been happy in the past with just a good head unit and decent quality speakers (in my old cavalier I had the pioneer 6x9's I have boxed up now waiting to repurpose and 4x6 pioneers to match, along with a nice pioneer head unit for that time.
I'm not completely concerned with sound from the speakers I'll be buying and the stock head unit though I know a few speaker sets will sound better with it since they wouldn't be powered very well. I may do the fronts and head unit at the same time, and determine if I need to add an amp (ie powerpack or clarion).
I guess a suggestion for a head unit would also be in order. I'd really like one that I can see my phone GPS on, but I've been out of car audio stuff for some time now, and know little about the newer units. While I'd love one of the newer pioneer AVH units, I'm not willing to go north of $500 for a head unit, and would much rather stay under $400, even if it was a refurb or an older model new in box. Any help or opinions would be appreciated, feel free to message me as well as I know I have a ton I'm asking.