I'm about to get a Galaxy Nexus i515 tomorrow, and I was wondering if it is worth the $25 on Amazon for the Samsung official extended battery, or if I should go with one of the bigger ones. I hate having the big bulge in the back of my phone. I do about 2 hours of listening to music, 3+ hours of Facebook and Craigslist, and about 1-2 hours of various other things daily.