Off the subject a little, but I worry so much about the recent Canadian attitude of younger folks to get our of debt and then rush to get right back in. (Yes, mortgage is debt no matter what peers and memes tell you.) Retirement savings (e.g., Registered Retirement Savings Plan) should be an absolute last resort when it comes to a downpayment on a house. RRSPs should be seen as everyone's holy grail of sanctified tax-free growth for when you're old and not a piggy bank.
So, personally, (in this weird and ridiculous Canadian housing market) I would find a reasonably priced rental, stash the difference, and wait until it's absolutely necessary to buy a house (that means having kids). I know hormones say, "let's settle down and make a perfect little gingerbread homestead", but that's emotion and not math or investing.