Okies, ive got a level 63 Nelf druid, But ive got bored with shifting into Cat form and mashing the claw button every 2 seconds...+ ive never ever played on the horde

So i was thinking about an Undead warlock because of the cannibalize thing and they look pure awesome in robes and a hood.

And may-bye later ill get a druid tauren + Orc pala =]

So any reasons why i should/shouldn't go for an UD Warlock?

P.S whats the best normal realm for balance e.g. 50% Alliance 50% hordies (was thinking about Draenor)