Best smartphone/PDA phone under verizon wireless?

My phone plan ends in 20 days and I am a college student (20 years old) looking for a smart phone/PDA phone under verizon wireless since my parents are switching to verizon and I want to get cheaper call rates. I'm looking for a phone that has a really good day planner and calander preferably one I can download from my computer since I am very ADD and need to be organized on the go. Also I want to be able to check e-mail, browse internet, use google maps ect. What is the best phone that does all of that? Outside of verizon wireless, what is the best phone out there of all plans?