Personally I would use QV (or any of the mex stuff) only as a last resort. I never used QV prop but was extremly disapointed with their Cyp, EQ and Deca. Basically no results or sides for me or any of my friends.
I've heard nothing but good about any of the Canadian labs. My only experience has been with LFC and their prop is fantastic, great results with no discomfort. If you can find it, Body research (Thai) makes a great Viramone copy which is also reasonably priced (Aprox $5/100mg)