You should be buying a GIA Certified Diamond at that price.........I would stay away from diamonds that use fancy terms and very marketing oriented language.
I've never heard of a Canadian Ice Diamond. Canada has some incredible diamond mines that produce very clean, white diamonds. I have bought and sold many that Diamonds from Diamond Dealers that buy sites from Canadian Mines. I have never heard them termed as Ice Diamonds.
If you are going to layout that much money, I'd just go to Blue Nile and get an VS1-G Color 1 Carat Round with Excellent Cut Grade, Symmetry, Polish, etc....
Any diamond that requires the use of a substandard grading system, don't buy it. You will regret it and there is usually no way to get your money back.
If you are looking to save money, go for a GIA SI1 with F or G Color. Make sure that the inclusions are in the girdle area or near the girdle in the crown facets. Don't by a diamond with a High Relief (black) inclusion.
You can find a better deal and often times it will be online. Use a online retailer that has a return policy you can live with......