The Digiwave 2084 is the 4 bay bowtie sold now for $24 at the Dixie and Matheson stores. Also available is the yagi/corner reflector (Digiwave 2190) for about $60. I've tried both. The 2084 is more forgiving if you have the CN TWR and BUFFALO at close, but not quite the same azimuth. Say up to 50 degrees different. The Yagi (2190) is much narrower beamwidth that will let you eliminate ghosting problems... reflections coming from angles different than the direct line towards the transmitter.

These are good chimney mount antennas but can be used on balconies too.

A guy in Georgetown with a 2084 at roof level gets 13 HD channels (including subs). He aimed for CN TWR and got the strongest Buffalo too. Places like Nobleton or Woodbridge are great with the YAGI since Buffalo and CNTWR are lined up with each other. 21 HD channels including subs (essentially all that are available).

ITS NOT ABOUT GAIN and how much amplification you have! Yes, you need signal AND you need a directional antenna to get rid of ghosting. To aim the antenna I compared analog video quality from another transmitter in the same location and close in frequency. For instance, CITY TV 57 is 53 on HD. If you get a ghost free 57, you will get it in HD. As soon as the picture displayed a reflection, that was the end of HD. Weak signal is much less of a factor than multipath (ghost). There are people in Toronto with LOTS of CITY TV signal, but due to a poor antenna (aka amplified rabbit ears) can't get HD due to multipath. One house near High Park had a Radio Shack amplified Omni-State antenna on their chimney for a few years. Lots of signal, but many of the channels were impaired with multipath. They received only 3 HD channels with that antenna.

Check what is on your TV horizon and azimuths by inputting your coordinates into: www.tvfool.com