ok so Im looking into getting new audio and was needing some opinions on which setup to go with? I was either going to get a 5 channel amp or 1 channel & 4 channel

5ch:
-Front 100watts x 2
-Back 25 x 2
-Sub 250 x 1

OR

4ch:
-Front 75 x 2
-Rear 75 x 2

&

Mono 250watts