HTC Diamond vs Blackberry Curve

As a salesman it is very important to stay up to date on pricing of the product you are selling. Often times, in my industry, they will notify you of this pricing by email. Having the ability to get these prices while you are out of the office is very important, so I have decided to get a PDA phone. The cell phone provider I have has basically two options, the HTC Touch Diamond and Blackberry Curve. After looking at them both, I decided for durability sake I am going to go with the Blackberry Curve, even though the HTC Diamond would be more user friendly, I want to make sure that my phone will last.