Help me pick an Android

I'm after an Android phone in the UK. The Nexus One is appealing, as I'm keen to get the OS updates as soon as possible once they're released. Am I correct in thinking the Nexus is the best in this regard as it doesn't have vendor specific OS "enhancements" stuck on top of it? 

I'm coming from nearly three years with an iPhone. 

I'm planning on using it primarily as a business phone linked to my Google account and for app development purposes.

I know it's been around since January, but it's only recently hit UK shores.

As it's primarily for business and development, I'm not that concerned with the very latest bells and whistles. Stability and quick OS updates after release are more important to me.

Does the Nexus seem a good bet?