alright, my brother is after some gear and only has $800 to spend. He already has a good alpine HU so i just wanna know what the best sub, amp/s and splits combo u guys can come up with for around the $800 mark.

my suggestion was vibe S-AK60's for the splits, a vibe blackair 12 and then im not sure on an amp. what can you guys come up with??

Hertz HSK-165 (~$300)
Earthquake DB-12R (~$100 second hand off me)
Amplifier, no idea for $400..big ass Jaycar one?