Though it may be worn and in need of replacement, the type antenna you describe should receive the three strongest US signals even though it's aimed the opposite direction.
Is your TV equipped with a built-in digital tuner, or are you using an external digital converter? Reception of the Buffalo signals will, for the most part, require a digital capable tuner.
http://forum.tvfool.com/showthread.php?t=2887
If the goal is to use two antennas, no rotator, and maximize the reception from Toronto and Buffalo, then:
I would use a Winegard HD7696P pointed toward 165° compass for the Buffalo signals.
If the existing antenna aimed at Toronto is in good condition, keep it. If it is at the end of it's service life, you may want to investigate the future plans of CKVR and CIII. digitalhome.ca is a useful resource re. Canadian stations. If either of those signals are of interest to you, and they plan to continue operation on CH-3 and CH-6, your choice of replacement antenna would be similar to the existing antenna. If neither CH-3 or CH-6 is of interest, a Winegard HD7694P aimed at Toronto would be a good choice.
Here are several option to consider regarding how to connect multiple antennas:
http://forum.tvfool.com/showthread.php?t=2882