Technologically challenged

Last year it was time to upgrade my cell phone so instead of a traditional phone, I went with a Palm Treo', thinking I would be able to lose my "planner", store music, use the calendar, phone, etc. Well....I didn't use half the crap on the phone. NOT the easiest phone to use, plus our office didn't support the Palm so syncing was a b****. Now I think I want the iphone, but is the iphone better than the blackberry? Can I store music on an iphone that can be docked on a d. station? Do I really NEED an iphone? How easily will it scratch/break? I'm so confused.