The mod was really really good so I have no issue at all buying it. When xen comes out im sure I'll enjoy it then too.
I don't think you guys realize just how much these devs put into the game. All new voice acting, music, sounds and models all by a team of 10ish people. I'd have been happy paying 20 bucks to get a redone hl1 when the mod was first released (for free !) And I'm happy paying now.