We have iPhones, my brother has a Droid. I can't see a lot of difference between the two as far as speed or what they can do. Everything my phone does, his phone does and vice versa.
For me, I already had an iTouch. Every app that I bought for my iTouch could be put on my iPhone so it saved me money! Also, my daughter has an iTouch and her's is synched with my computer so every app I have, she has too.
I love the iPhone operating system and the apps. I use a Mac so putting movies, TV shows, music and games is easy. I can convert my DVDs to iPhone files for free using Handbrake.
I think you should go to the store and fool around with both devices. I honestly think if you are PC-minded you'll be fine with a Droid. They are cheaper and just as nice.
But if you love Mac, already have an iPod or iTouch, you'll LOVE your iPhone! Pricier? Yes. Worth it?To me it is!