Sub and amplifier ?

If your amp is capable of 1500w rms at 1 ohm, yes, it should work fine.  That would give you 750w per sub, theoretically.

You'd get more detailed answers if you'd provide the brand/model subs you're looking at, and brand/model amp.

Cheap brands lie about power handling/output.

a] Not if the amp isn't stable at 1 ohm

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b] Not if your car's alternator can't handle that much power

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c] Two of those subs is overkill. Adding a second sub and the power to run it won't double the loudness. At best it would be 20 percent louder at full output. Since You'll never be doing that, one sub that is adequately powered will be more than loud enough to blow out your eardrums and pissoff the neighbord. 

It will work fine, as long as you have enough electricity to run it, and the amp is 1 ohm stable.

Yes, you can wire 2 4 ohm DVC for a 1 ohm load. But the problem is that, the monoblock needs to be 1 ohm stable. If not, the monoblock will come to an end. That means you will be replacing the monoblock for a new one until it is 1 ohm stable.

I'd recommend getting the DC Audio 2.0k monoblock.

If your alternator is powerful enough to produce 3k watts, then get the DC Audio 3.5k monoblock. Then set the amplifier's gain to match both of the subwoofer's 1.5k RMS.