These are the mods I use for Skyrim. I haven't played in a few months, so I haven't checked out any new ones recently.
Unfortunately, I think one of these ****s with Dawnguard, because I've never been able to transfer into vampire lord form. Could just be a twitchy Bethesda thing, too. I may start a new character at some point and give it another shot - perhaps the problems been fixed with a patch.