Memphis 16-PRD1000.1 - Memphis Power Reference 1000 Watt Mono Amplifier-$329.99
Infinity REF1211A - Infinity 1200 Watt Class D Subwoofer Amplifier- $359.99
Soundstream PCA1000D - Soundstream 1 Channel Amplifier- $359.99
Soundstream PCA1500D - Soundstream 1 Ch 1500 Watt Amplifier- $359.99
JBL GTO1201.1II - JBL 1200 Watt Mono Amplifier- $369.99
Mmats D1000.1 - MMats 1000 Watt Mono Amplifier $379.99
Alpine MRD-M1005 - Alpine Mono 1000 Watt Amplifier $399.99
Soundstream PCA2000D - Soundstream 1 Ch 2000 Watt Amplifier $439.99
Memphis 16-MCD1000 - Memphis 1100 x 1 Class D Subwoofer Amplifier $449.99
Diamond Audio D61000.1 - Diamond Audio Amplifier $468.99
all the prices are from woofersetc
should give you an idea of what all you can get.
you can also get the diamond 1500.1 for under 500 off of
ebay.
i personally would go with the diamond 1500.1, the orion, or the soundstream 2000d. I think the diamond is your best choice because its very very well built and gives you plenty of head room.