Jean, do you know for sure they are recessive wheaten? If they are, when they are crossed to a \"wild type\" (small e at the e-locus), the offspring will appear as wild types - the typical BBRed or Silver pattern. If dominant wheaten, the females will probably appear to be a mixture of wheaten and wild type.
You can use either with buff. Buff involves a lot of recessive genes, so you will not get a good buff in the first generation outcross anyway. It will take several years to get the real good color back. If you get lucky, there might be some decent ones in the F-2 generation, assuming you raise enough of them.