i think you should say more about what you have in mind.  some hair looks great as long as it never casts shadows, otherwise your rendering time will go through the roof.  do you want long hair or short?  what will your people be doing?  hair doesn't move that much for about 75% of what people do in real life (unless it's windy), so if you're not doing action stuff, morphs might be enough for your animation.  lots of action, and movement is a bigger problem.

personally, i've never found any one hair style that worked all the time.  they've all had pluses and minuses, and i almost always go through about 8 different hair styles before settling on one or giving up and deciding just to rely on postwork.  not because i haven't bought some of the best, because i have.  but i've always found it hard to fit poses.

the ones i use all the time are Koz's Long Hair Evolution, Maelwenn's Vanessa Hair.

i liked Leah Hair from DAZ because of the body handles.  there's a product in the store here that says it lets you add body handles to any hair.  you might want to purchase that.