in my opinion i think a yellow top and uprated wiring would do the job for you for up to 2000wrms. The only thing to be careful of is that the battery will discharge quicker than it will recharge...
so basically you'll have to spend a slightly little longer with the stereo on low or off than cranked up to the max to ensure you keep on top of the battery's charge.
When I was tinkering with my system i was at one point running a single 15" at around 6000wrms, with a yellow top, and i found that once a week or so with occasionally turning it right up i would have to trickle charge the battery for a few hours to keep it charged fully. You may need to do the same occasionally.
I think you would be more than ok with a yellow top, or even consider an optima red top. They are slightly less powerful but will do the job all the same for the power you would be likely to run. Have a look at the stinger batteries also they are cheaper and will perform for you.
For your setup i would see if you can get hold of a volts gauge, or a battery charge reader to keep a track on the batteries condition if you listen to your music loud a lot. a volts gauge will only drop below 12.5 when the batteries empty, so this will help to let you know when the battery is almost empty, and let you know that you should keep the car running to charge the battery.
only advice i can say is do the big 3, get hold of a decent audio battery and be aware of the battery needing to be recharged. Stay away from power caps as well mate! they won't help... with the power you'll be running they'll get drained VERY QUICKLY and end up blocking current from flowing directly from your battery. Bass will end up being very sloppy and air movement will drop considerably.
hope this is of help mate, and if theres anything else you ever need advice on just ask =)