Question about wire options

[Question Mark]

I have a dynaBel BF7501 that puts out 750W@ 4ohm,1400W@ 2 ohm and 2500W@ 1 ohm. My plans are to buy a single SA-15 which is 600W rms, but some says you can add some more power to it in shorter period of times. So what should I wire it to? 2 or 4 ohm.. The amp for the mids and highs is a Mosconi AS 100.2 (100W@ 4 ohm) I am going to buy a Odyssey PC1500 that fits under the hood. The battery is giving out 1050CA. I may also buy a second woofer in the future to exploit the amp properly and then extra battery?

Appreciating any answers, thanks