When is the next big sale day for components?

Generally ~Feb/March during the slow season there will be some general price drops, but this year with so many new releases coming out at that time I doubt there will be many deals to be had (except on old hardware). Perhaps 4th of July?

The simple fact is that high end hardware does not go on sale, and when it does it is only $10-20, which is not enough to make waiting worth it if you already have the money saved. Only expect good deals on mid-low end hardware.