I haved a 1400 pt Space Marine Army and I'm thinking of making a 2nd army once my 1st army reaches 1500. I am planning on making it a cron, ork, chaos, ig, or witch/daemon hunter army (I've heard that Eldar/Dark Eldar armies are difficult to use effectively and I dislike the Tau and nids for some reason). Can you guys give me tips on which army I should pick? I want a cost-effective one that is good against other races and would be effective when allied with Marines in Apocalypse. Also tell me if you think I should reach 2000 pts or higher before starting a new army.