re audio/us amps subwoofers 4 ohms or 2

I'm trying to figure out if RE's model xt1600.2 v2 will work well with two RE SEx 10 d4 (4 ohm) subs. It is a class AB amp and is rated at

200 watts x 2 @ 4 ohms
400 watts x 2 @ 2 ohms
800 watts x 1 @ 4 ohms

The subs are rated 600 watts RMS. Should I go with 2 ohm subs instead? They also make this amp in an all digital model. Should I go with that?

I'm learning all this as I go. I'm a journeyman electrician so I know of Ohm's law and all that, but I'm at a loss with this amplification stuff. Any and all help is appreciated

I have that exact amp and (2)re audio sr 12's 4ohm dvc,I run the amp bridged 800x1@4ohms and they pound hard .People have a tough time sitting in my truck through a whole song that hits hard,very good set up.

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-A vision without a plan is just a hallucination-

You have two dual coil 4 ohm subs.  Each can be series wired for 8 ohms, then the two subs can be paralleled to make a 4 ohm impedance.

The amplifier makes 800 watts with a 4 ohm impedance load ( see rant ) bridged across the terminals.  That is 400 watts per sub which is only 2/3 of what you say is their limit at 600 watts each. 

What you have is a match.  If you switch to the digital amp, I'll presume it is a one-channel class D.  If it is such, it would match best with the two DVC 2 ohm subs, so that, combined, their impedance will be 2 ohms.  The class D amp would take less power to operate, being more efficient than A/B, and perfectly suitable for subwoofers.

See the blue section to the left of this screen.  Under Car Audio & Mobile Video, go to the Subwoofer Wiring Options, or to Parallel and Series Calcs.

 to haemphyst.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.

Just won't let it go, huh? :P

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It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."