Well you can never go wrong with Trickflow's or AFR's but that kind takes you out of the budget category.

World Products iron heads are a fairly decent head for the money and not too bad priced. Or if you really, really wanna go budget a set of worked over e7's isnt all that bad of a choice....but I would use that as a last resort option.

Of course going budget just keep a look out for used heads.....they are out there.

Good luck!