Enterprise SEP isn't that bloated, we've got some good endpoint monitoring software that let's us know what's going on with each machine (around 5000 desktops/laptops) and SEP is low on everything.
Ender, what is it your looking to get out of the Ultrabook that makes you hesitant? If it's space for music, movies, pics etc., just put everything on an external firewire or eSata drive and just use the solid state onboard for apps/installs.