I am going to buy a laptop and I'd to know what's the best...?

I am buying a laptop soon and I really want to get the best option for me. I am a full time college student so Microsoft 2007 is a must and lots of storage room for papers, power points, etc. I also love music. On my last laptop before it was stolen >:( I had over 1,000 songs on my itunes, so I'd like to get something that will hold all my music. Also I want something that has a long lasting battery. I had to lug around my charger to school every day because my laptop would only stay charged for two hours. I want something that will last me through school and beyond. Price is unimportant. Any suggestions?