What platform do you prefer? Droid, Blackberry or other? If it's a Droid and money is not an issue, go with the Droid Incredible or the Motorola Droid. Both are awesome devices, fast with plenty of memory especially the Incredible. If money is an issue, I'd pick the Droid Eris. If it's a Blackberry, it won't matter unless memory is an issue. There is no device that can top it in regard to messaging and email, ease of use and security. PERIOD! I'm not fond of Windows Mobile phones, but many people are. So, what are your preferences? What is important to you? How much are you willing to spend?