Removing Door Panels - Hatchback?

[rmshort]

Lol, I did research for weeks on speaker sizes on the Yaris and found multiple sites that said 6.5" front and 6x9" in the back for hatchbacks. Said sources did not specify that goes for the 5dr hatches I'm assuming because I had to do some custom work and grind some of the metal out of my B-pillar speaker mount to fit the 6x9's basket. After about 3 hours of custom fitting both sides, I got them in and panels fit flush. Very happy with my set-up. Went with Atoto A6 stereo through 6.5" 45w-rms and the 65w-rms 6x9's (Rockford Fosgate Primes set for $80USD via Amazon) and a 100w 8" Rockville underseat sub. Only thing I'm missing now is a 4-channel amplifier. Any suggestions? Looking for around 220w-rms..