I had thought about going for ogres but the new undead rules and fluff sound really interesting. Also I really like the new models. I also like the sounds of having loads of necromancers summon even more undead while the rest march on silent. The thing is I know nothing about the rules, I played a demo game at my local GW but I'm just wondering are they going to be one of those armies that take a long time to get good at. I'll start by buying the nagash book and getting ideas from that, afterwards I'll probley get the tomb kings and see what there like.