Hi Justin,
Your QS is (partially) based on your final landing page (after the redirect in other words) so depending on your keywords/phrases that page might be more or less relevant then the original url, but the redirect itself should not be causing any negative quality score issues. What quality score details are you seeing in adwords? You could always experiment using both landing pages for a time to see what quality score the original page gets also and to see if there are any differences in the average cpc (if that is what you are worried about).

