Not knowing brands and what size speakers to match amps is why i am here. Now if i knew everything i would not have a reason to be here would i. I'm not asking which brand is better than another because every which brand someone has is always the best, right. I just asked if i have a mono 1000w amp what wattage subs would i need, that's it. Do i need 300rms ea, 500rms ea, 1000rms ea, etc.
Im a little confused about your confusion. You seem to realize your amplifier is capable of producing 1000 watts, and you know you are wanting 2 subwoofers, so it just seems like you'd realize each sub is going to receive approximately 500 watts. Im not trying to be a ********, Im just saying maybe Im missing what the real question is here.
Multiple coils on one sub simply means more flexibility to wire up to different amplifiers. Class D's tend to have peak output at 1ohm, class A/B's tend to peak at 4ohms. So a sub with dual 2ohm coils could be wired up to either a Class D, parallel the coils for a 1ohm mono load, or wired up to a class A/B, series the coils for a 4ohm mono load. You need a final load of 1ohm mono for your amplifier, so two subs with single 2ohm coils, or two dual voice coil subs with 4ohm coils or 1ohm coils.
What's your budget?
What your space available?
Are you going to build the box yourself?
Is there a reason you've decide on two 10's specifically?
Are you saying you do, or dont, want advice on which sub to chose?
The more info you provide to us, the better our answers can be.