Optima Yellow Tops work well, although it's always better to go with the best, and you'll pay for it too, but if your not on a budget, definetly go with XS power, get the largest you can afford (leave room for later upgrades) and put it in the trunk, then run it in parallel to your starter batter, with AT LEAST 4 gauge wire, definitely try for 0 gauge. The other option is replacing your starter battery with a compatible sized battery from xs or optima, IF u can find one that will fit AND meet your power requirements. And DEFINETLY DO THE BIG 3. If you don't know what that is, everyone will be happy to explain.
As for an amp, Soundstream has the DTR series, they're affordable and they're durable. No matter what amp you choose, keep in mind that manufactures will over rate there amps, so unless someone on here tells you an amp is ok, ALWAYS check to see if it is CEA compliant. it will be on the amps data sheet or on the manufacturer's website.
The big three is Big battery up front witch i have a optima red top, battery in back and what is the third? Ya i know amps are always overrated thats why its taken so long to buy amps. i got the money gotta find the legit one's. thanks