I'm about to get my first smartphone and I'm not sure which to get. I was really looking forward to the Thunderbolt, but since the release has been stalled, it seems closer to the next release which I think is the Droid Bionic. I've tried to do my research and have read that the Thunderbolt has single core processor vs the Bionic with dual core, but as a first-time user, would I really know the difference? I've also read that HTC Sense is easier and user-friendly. What is the difference between the two UIs? Also, I've read about rooting and understand that it unlocks the phone so you have more options, but I don't know what the difference is between the options I'm given by the phone and the options I'd have after rooting. And if I end up rooting my phone, does Verizon void my warranty? What about Anti-Virus? Do I need to install that on my phone? If so, how do I know which one to install? Is there a way to put my music from iTunes onto my Droid? Someone said you just need to change a song into an mp3 and then plug the phone into the computer and download it. Is this true? How hard/time-consuming will this be for each song? And in reading on the forums, I see people using "ROM"...what is this? Thanks in advance!