I really like what I see in the Inspire, but be careful and don't get all caught up in that "4G" nonsense. Its not available in most places right now, and where it is, its really not that much faster.
If the next iPhone doesn't have a larger screen at least (and preferably a larger form factor overall) I'll probably skip it and get an HTC while keeping my iPhone 4.
I've wanted more experience with Android, but hate most of its implementations. HTC is the one I like the most, and ironically its the one Android purists like least because its the most "iPhone like"
If you do get it, I'd be interested in your experience with it