I'd suggest an Antennas Direct DB8e + Antennacraft Y10713 + RCA TVPRAMP1R.
Mount with a clear view to the south, free of obstructions such as trees or nearby buildings. Start with the DB8e facing about 140° (mag) and the Y10713 pointing at about 165° (mag). The TVPRAMP1R has separate inputs for UHF and VHF.
If you want to try for the LA signals, I would build a separate system rather than using a rotator.
http://forum.tvfool.com/showthread.php?t=2882