Lol, looks like we're kind of on the same boat. The tax depends on what your tax rate is at B.C., I know here in Ontario it's like 14%? But that's not all, you have to pay a "duty fee", I have no idea how much that is though..
Well after I did some extra researching, I think the bad news is that there won't be any sales on items like the P-155. Boxing day sales are usually for refurbished items and P-155 is fairly new, so a "big" sale probably won't happen. Don't quote this though, I am still not 100% sure either. HOWEVER, there are sales like the $200 off for all YAMAHA products at stores like music123.com, which I found out at this site, so there MIGHT be still a glimpse of hope for some kind of sale.
I guess it comes down to if you want to play it now or not.. personally I would love to play it now, but I am looking for a place where they have financial plans that allow me to pay monthly... because I am a student, so money doesn't exactly come to me. Lol.. so if anybody know of such companies, please tell me. Or can this be planned a local music store? I'm not too keen about the whole local shop stuff with a financial plan because I usually think of scamming or that sort of stuff.. err.. that is why I usually buy my "big cash" electronics at big stores like Bestbuy where I can pay monthly for like 2-3years without interest.
Sorry if this reply is a bit long. :P
Look at that thread, it'll give you ideas, especially the michaeljoo guy and how he kept fighting for a better deal. So good luck, hopefully Musiciansfriend.com will have a quick deal on P155 because atm, no sites do besides music123 but they don't ship to Canada. :S