Battery Question

[GOTLDH]

I have a 22' lavey craft and have just had a system installed. I am running two jl audio amps, two 12" jl wx3 6 6x9 & two 6.5's. My question is which battery is my best option. I am set to run two and have been thinking about the optima deep cycle. Is this my best option? How much do they run and where can i find them? I live in So Cal but my boat is stored in Havasu so either place is cool with me.
Thanks

[ROZ]

I've seen the marine (blue top) at Costco from time to time for around 150.00 or so...

[TOBTEK]

http://www.***boat.com/image_center/data/500/135battery_baox_001-med.jpg
http://www.***boat.com/image_center/data/500/135battery_baox_002-med.jpg
NEED A BILLET BOX FOR YOUR NEW OPTIMA? I HAVE A EXTRA BILLET CARRIER THAT IM NOT GOING TO USE.....I MAKE SMOKIN DEAL JUST FOR YOU:D

[phebus]

Costco, Optima Blue Top deep cycle-$142.00
AutoZone in Havasu-$149.00