Thanks for all the replies, guys! Much appreciated.
The amp I ended up with is the Kenwood X302-4. Rated RMS power output: (4Ω, 14,4V) 50W x 4 (20Hz ~ 20000Hz, 1%THD). I've paired this with a set of Focal Auditor ASE 165 2-way components for the front doors and Focal Auditor ASE 130 2-way...