that is quite odd, as the build quality of the oem speakers is on-par with most aftermarket speakers
i haven't heard these, but the specs look decent, and they're for rougher environments.
https://www.parts-express.com/tang-b...2-ohm--264-964
then paired with this amp, i like shooting for around 50-100w rms with most of my builds..
https://www.sonicelectronix.com/item...L-GX-A602.html
that would put you around $195 + install costs. you could slim it down by only replacing the speakers instead of the speakers and amp. more than likely, the speakers are the root cause, amplifiers don't commonly go bad, as there's no moving parts to break down on them.