That is quite the paradox. You're best bet to find a decent amp for the money may be to look for something used. Try to find an amp rated for one channel, 600 amps at 2 ohms. Connect the subs in parallel and then let her rip. Be careful buying an amp with high THD. this will blow a sub quicker than too much power. Also buying an underpowered amp and cranking the input sensitivity gain will also harm the subs.
2012 GT CS Ingot Silver Vert, Edelbrock E-force supercharger with CAI and 3.5 Pulley, Tremec T-56 Mag, Accufab 84.5, Centerforce DF, Billet Yoke aluminum driveshaft, FRPP 3.73 Rear, MRT Performance H-pipe, Bassani axle backs, JL Audio sound, Edelbrock strut tower brace, JPC adjustable UCA, UMI adjustable panhard bar, KW V3 coilovers, Steeda heavy duty front mounts, Steeda rear LCA's, 20" Steeda Spyders with Michelin Pilot Super Sports, Steeda Big Brake Kit ....... it just keeps going.