set top ant. for rca hdtv

My friend just bought a rca 38" hdtv with built in receiver. She lives in a 2 story house and the unit will be on the 1st floor. I'm helping her set it up but really don't want to do any drilling/mounting of antennas. Is there a good inexpensive set top antenna to pull in ota hdtv broadcasts?
Check AVSforum for all the details on HDTV. Some folks there report good reception with RS bow tie UHF antenna. I'm sure it depends on your location relative to the transmitter.
Here in Albuquerque the HD signal isn`t strong enough for rabbit ears to pick up. Our store`s rooftop one can.