sounds good!
for the sorcerer however, if you're only taking 1, then don't upgrade his level... at 2000pts, a single Lv2 wizard will not get any spells off unless you get an irresistable force. you're better off saving the pts and getting more men on the board. (keep in mind you're still going to have a low model count as that dragon-riding lord will eat up at least 1/4 or so of your total pts!)
if you add in the chaos warriors you'd mentioned earlier, i'd mark them nurgle as well. fear is simply a lovely thing in fantasy! plus it'll give yet another psychological tool to torment your opponents with!
why not post up a list too? i'm sure there's a few others here who also dable in fantasy.
cheers!