Next logical upgrade from a Desire?

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http://androidforums.com – The time is approaching for my yearly PAYG upgrade, normally just pickup a second hand model floating about. Got a Desire currently and the wife will gladly take it as she needs minimal apps, I on the other hand like to have handy apps = Desire internal memory crops up again. Would like to stay HTC as I like the sense ui, was reading reviews about the Desire S & HD models, any other suggestions? Alan. (General)