I think the Incredible S is the same phone with a smaller screen. If you're looking to root, I think it's a bit harder to do than the DHD though. The lg optimus 2x is rooted very easily, but with minimal ROM support. Sony ericsson xperia play looks as if it has a lot of Dev support, but scanning the dev threads on XDA, root looks complicated (although if I had the phone and investigated for more than 15 seconds, I might have a different opinion).
Are/were you happy with the DHD?