Upgrading Sub Electrical Question

Sup dudes. So, right now I am running 2 svc subs running at 300 watts RMS a piece. Right now my sub is wired to power them at 2 ohms @ 600w RMS. I am looking into upgrading to 2 dvc subs running at 600w RMS a piece. My amp can output 1200 w @ 1 ohm. Right now I'm running my Jeep with a stock battery and alternator. Should I be looking into upgrading my battery and/or buying a HO alternator?

Thanks in advance.