Tigerdirect.ca has a good deal on a quad. Also have a coupon for $10 off for it.
EDIT: Found a better deal
Phenom X4 925 @ 2.8ghz (will overclock)
http://www.newegg.ca/Product/Product.aspx?Item=N82E16819103940
Current is a AMD Athlon X4 620 @ 2.6ghz
http://ncix.com/products/?sku=42600
Is...