If we want to have a voice in contemporary American politics, then these parties represent our best chance of being heard. The Demoncrats, on the other hand, allow conservatives no voice at all. If you don't believe that, consider this. Bush is known to be pro-life. Name the last pro-life Demoncrat to speak at a Demoncrat convention, and then name the last such Demoncrat to hold a cabinet level position.
Some voice is better than no voice.
For now, Republicans represent us better than Demoncrats.