Here is what I would buy to start out with.
2 Battalion Boxes(Gives you 12 Bulls, 12 Ironguts, and 8 leadbeltchers), Firebelly(cause he's awsome), and 2 boxes of Mournfangs.
however, you don't need 8 Leadbeltchers so you can assemble 2 of them as a Bruiser
BSB and a Slaughter Master(really easy conversion)
Bulls(or Ogres as they are called now) should have Ironfists. XHW is never worth it.
Mournfangs should also have Ironfists(and heavy armor)
That will give you around 2000 points for pretty cheap.
O, and join the Stronghold.
http://www.ogrestronghold.com/