I'm also a Desire owner, waiting to move up to a OneX+ ... I wonder how many of us there are? At least in my thinking, these are two breakout phones from HTC, and given the time between their launches, it may be a natural progression for many people.
Anyhow, how do you find the size? I like how the Desire slides easily into my pocket, and I can do almost everything with one hand. I'm almost thinking the OneX+ might be too big, but you never know until you have to live with it.
Regarding battery life, I can make it through the day 95% of the time, even moreso now that I'm on CM7. I don't do a tonne of processor-intensive stuff. So if the OneX+ improves what I'm used to, it should be no problem.