well, if you're the paitient type, the new codex & models will be coming out late next year?!
suposidly, the new warboss model is beyond huge! and the orky vehicle box from what i've heard, is basically just a bunch of sprues so there's lots of possibilities for building unique contraptions.
the boyz sprues aren't being redone so it is safe to go for a box or two of them!
keep in mind you don't need an hq model when playing combat patrol type games, (400-500pts), so you can hold off on the warboss!
cheers!