Well a lot of people would tell you absolutely not to keep a Heatwave female in the herd, and I understand what they are saying. The Heatwave females probably arent the most maternal and definately arent gonna blow you away with amount of milk they have. But all the ones I have seen or had experience with have raised a calf just fine.
Would I turn a Heatwave female out in a commercial herd, absolutely not, but if you have a Heatwave female chances are your goal isnt to produce some commercial, feedlot type calf out of her. In the commercial herd we expect the cow to do all the work raising the calf, but in the club calf industry most of us creep our calves and in my opinion the Heatwaves do just fine in this scenario.
As far as what to breed her to. You cant really just tell us she is a Heatwave and expect us to be able to give you a bull to breed to. There are a LOT of good bulls out there, and they all work on a different type of cow. If you are going strictly on pedigree then we would need to know what the rest of her pedigree is, but nobody can really recomend a bull without seeing the cow or at least having a good description of her.