I quickly attached the Philips antenna last night to see if it would boost the signal strength. It was actually worse than the indoor antenna! Based on the following map my antenna placement may need to change. This map was generated at
http://www.antennaweb.org/aw/Welcome.aspx. The next step is to try this outside and orientate the antenna in the correct direction.
I'm also planning on installing a full copy of Beyond TV 4.3 to see how it works with this configuration.
I was able to watch several channels in HD last night but run into an issue with 5.1 surround sound stuttering. If I move back to mono things are fine.