Actually though? I've done some Googling for various speaker options, and the one thing I'm kind of curious about is if I'd get anything out of swapping out the factory Bose 6x9's in the doors with these Kickers:
Kicker PS69 Powersports 2-Ohm 6X9 Inch Ps Coaxial Car Audio Speakers Ps692 | eBay
They're actually 2 ohm rated, like the OEM Bose speakers - and I know I've heard big improvements in the mid bass frequencies when upgrading paper cone factory speakers in various Chrysler products with Kicker upgrades designed for them. (So that tells me Kicker can build a speaker that's efficient enough to have good, full sound even on the low power output provided by a basic factory head-unit.)
I don't think many people noticed this speaker as an option because it's really geared for motorcycles or ATVs, not cars.