Some info on how you like to ski would be helpful, but if you're a relatively high end skier in Ontario, I would go for something along the lines of a high performance carver/race ski - don't be thrown off by the race designation, most "retail" race skis are as good if not better out of the course, on nice groomed hardpack - ie 95% of Ontario conditions.
Here are some recommendations:
SL:11m, ST:11, LT:11, SX:11
The SL and ST are both slalom type skis, the SL has a bigger radius and is more powerful/stiffer. LT and SX are more medium radius skis - around 16m. I would stay away from the SX:B5, as I've heard that in pretty much every respect the SX:11 is a more enjoyable ski and outperforms it.
5 Star, Allstar, Race Tiger SL/GS. Both high performance carvers, the Allstar is the successor to the 6 Star. If you're looking for something more high performance, the retail versions of the Race Tiger might be worth a look.
i.SL, i.Supershape, i.XRC 1200 SW.
The i.SL and i.Supershape are both recreational slaloms, great for laying down railroad tracks - the Supershape is new, so I don't have actual experience with it, but I'm guessing it will be a hot ski. It's sandwich construction, which Head does very very well with.
If you're looking for something slightly less turny, but still high performance, I would highly recommend the 1200 SW - people who read my posts will notice I mention it a lot (too much maybe :P), but I feel it's probably the best eastern high performance carver around. Absolutely awesome ski, you can rip lines at high speed, but it's still wonderfully responsive at low speed. I can't say enough good things about it.
Those are my suggestions, I know others will come up. As with any ski purchase, you should try to demo as much as possible. Depending on where you ski in Ontario, it may be fairly easy to find demo days, and if not, stores will generally let you demo a pair for a day for about $30, but if you end up buying skis from them they'll deduct up to 3 demos off the price.
Finally, Volkls are made in Straubing, Germany.