Pick yourself up a weekend Globe and Mail. They list the highest rates in the country for GIC's every week.
Peoples Trust has the highest 30 day(2.35%/$5,000; 2.45%/$50,000) and 1 year rates(3.1%/$5,000)
Achieva Financial has the highest 5 year rates(4.55%/$1,000)
GIC's are a money loser outside of an RRSP or RIFF though; there was a paper that came out of York U last March about it. You can check it out here
The Erosion Effects of Income Taxes and Inflation on GIC Investment Returns
Keep the $50 if these are the highest rates anyone finds.