Looking to replace the front door drivers with something that can run off of the HU for now. Open to coaxials or components. Budget is pretty tight, since I don't know what my long-term plans will be. $100(-ish) is about it.
Vehicle is a 2011 WRX 5DR (hatchback) with a Clarion CX609 HU that is about to be installed. HU is 14W RMS per channel according to specs, but take that for what it is worth. Current front speakers are factory components. Mounting depth of around 2" seems fine, but I can't find info on limitations due to tweeter protrusion. A quick browse on crutchfield showed that they list most things with a protruding tweeter as "Does Not Fit," but they could not give details on why, when I called and asked. (Example- Polk dB "slim" 6.5s fit, but the "regular" version does not, despite nearly identical mounting depths.)
Will be adding a small Clarion underseat sub for the short-term (carryover from my last vehicle), but may swap out for an 8" or 10" in a custom box (similar to a JL sealthbox) down the road.
Future options are undecided...
If I buy inexpensive components that sound pretty good, I may amplify what I buy with a small dedicated amp (no more than 50W per channel). If I buy some good coaxals, same deal. If I go with coaxials now and decide that I want more up front, I may move what I buy to the rear doors and upgrade later.
Logical budget choice is Polk dB coaxials (or even components), but I would not be asking here if I had made up my mind.