What's the best android mobile phone for application development

I will have to develop some android applications. Witch mobile phone is better for application development : Google Nexus One / Htc Droid Incredible / Htc Evo 4G / Motorola Droid ?

I have to develop on Android 2.1 and开发者_StackOverflow社区 2.2. All those devices will have the update I think.

Thanks for ideas

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Google Nexus One - For right now it is setting the standard for android. Google controls the update cycle allowing you as a developer to get the lastest OS software as fast as possible for test your apps on the device. The whole idea behind the nexus one is to give a true android experience, so based on that I say the nexus is the way to go. That is not to say you shouldn't test on every phone you can get your hands on.