G'day again waterbottle.
Really, the choice of amp and speakers behind my buffer board are purely at the users' discretion! What the buffer does is provide beautifully clean low level signals out of the head unit - Where the go beyond that is all personal preference. I personally love the Jaycar/Response stuff, but others have their fave brands. Regarding "bang-for-buck" though, Response stuff is hard to beat. (and no I DON'T work for Jaycar! Never have, I just like their gear.)
The buffer in my own car is only 2 channels (rear L+R), and I run that to a 4x50W Response amp, but set it up as two bridged channels. This drives a pair of Response 7x10s in the parcel shelf.
The first of the 4 channel boards I fitted ran out to a Pioneer 4 channel amp (can't remember the model) with the TS160 (?) kevlar splits in the front doors, and kevlar 6x9s on the parcel shelf - sounded great! The next one was set up with subs (2 10" units in the boot) and rattled the windows in my house while it was parked in the driveway! (well, almost!
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Shoot me a PM if you need to know anything else, we can work something out regarding fitment as well.
Cheerz! :thumbsup: