I'd recommend the 36" dish (90cm), or even the 100cm dish if you can afford it.
This
S1 system will probably do,
http://www.sadoun.com/Sat/Order/Sate...TA-Systems.htm
but see if you can upgrade to bigger dish as stated above. It will work better for you in Montreal as you are a bit north of the typical user.
If you are only looking for
IA5 you wont need a motor to move the dish.