Aim to put down at least 10%... that is your best marginal bang for the buck unless you can come up with 20% or 25% down.
If this is your first home, leverage RRSPs since you are allowed to take a lump-sum tax free on the purchase of your first home.
Keep in mind however that you can need $5000 - $10000 in closing costs... lawyers fees, perhaps paying for upgrades in cash so as to not carry it on your mortgage, etc.
This must be an exciting time for you... once you get a foot into the real estate market you are pretty much set since from then on you will be building equity and any time you sell you should and will make profit.
Make sure that you shop around for mortgage rates too... best to use a broker but also do your own DD. Go for the cheapest rate... do not fall for any of these "cash back" incentives on mortgages. They rape you on the rate even if it seems like a slightly higher rate... over the term of the mortgage that will outweigh the incentives.
Again, good luck!
