After they moved to Vancouver, they made some great episodes that can easily stand with their work in Vancouver. Triangle, Two Fathers, One Son, X-Cops, The Unnatural, Closure, Hollywood A.D., Within, Without, Essence, Existence, and The Truth are some of the wonderful episodes from S6 to S9.
Personally, I think there's pluses and minuses to both locations. I love the look and the versatility of Vancouver for the first five seasons but, in retrospect, I'm glad that a change came in Season Six. I think it gave the show some new visual blood.
Watch the opening credits on any of the other episodes on that disc and then watch the opening credits on Triangle. If Triangle hass the same transfer as the original discs, you'll be able to tell instantly. It's that bad, trust me.:)