I think I will go ahead and get all of the things on my list this year rather than waiting for my savings to hit a certain level because of the sales tax hike. I have things like furniture, rugs, miscellaneous furnishings and clothes on my list. Since interest rates are so low, I really wouldn't be costing myself anything by lowering my bank account balances, so why not get it all done now and avoid the 1/4% hike next year? Seems like it makes sense to me, even if I don't feel very comfortable spending such a large sum in such a short time.
Or maybe just go the barter route..find it used and avoid the sales tax altogether.