Shannon, my go-to source for summer tops is usually J Crew for their linen T's and sweaters; the fabric is cool and the tops are available in a host of colors. I also find the J Crew feather-weight cashmere really useful when I'm moving between the sticky outdoors and frigid, air-conditioned interiors. Even their T's can be a bit more interesting than the average department store variety and, for me, the fit is much nicer.
http://www.jcrew.com/womens_ca...../71290.jspI don't think that J Crew has any stores near Winnipeg yet, but I've always had good service from the online Canadian site. Right now, the site is offering 25% off with the code SPRINGBEST; shipping is a flat rate of $9.95, although the fee is often waived during promotions. You might want to check them out.