a pair of 12w3 will not need a 1000 watt amp. they are only rated at 250watts each.

at whatever OHM they are, for a budget amp, get the JBL 600.1.

they are solid amps that are cheap as hell and pounds.

if you got more money to spend you can always get a JL 500 or a PPI 2600. those are the only 2 other amps ive heard a pair of W3s with. and all of them pound.