Gooch, I would not ditch the pump just because of the whine. Like ZC said, most of the new parts store units whine too. I would wait for real issues (bad noises, bad bearings, pump leaks, etc) before replacing it.
You might have just as good a' luck with thoroughly flushing the system. When I replaced the steering gear top to bottom, I ran synthetic fluid meeting Type F requirements and i think it helped. I would probably do that instead, based upon what you have said.
Good luck bud.