Or, you could buy the 150 later and just use the 80's to simulate the center dialog, many do this in the beginning. Then you would have a little more change for the sub or surrounds at this time.
Isn't Toronto pretty close to Dwight, ON where the Axiom plant is at? If it was me I would go pick up my speakers at the plant, that way you save shipping. Plus, you get a great tour and see all your options.