For brewed coffee, sifting may reduce some bitterness; the more taste bud advanced members here can probably tell you what the difference is.
Since you are in Richmond/Vancouver, consider Avenue18 for this gadget:
http://www.avenue18.ca/Accessories/Syph...MPS_50.htmOr, to save some money, most Asian supermarkets carry this item, for about USD$5:

For espresso, the ground coffee actually needs some fines, or a bimodal/trimodal particle distribution, so sifting will not be beneficial.