Look at the models on Dell's web site to get a feeling for it. Generally, you want to avoid AMD processors; although they make for cheaper systems, they run hotter and sap more energy than Intel's Core 2 Duo architecture, leading to often significantly shorter battery run times. Also keep in mind that Dell periodically runs specials, typically posted on Thursdays, like 20% off such and such model lines, or free upgrades to the CPU and HDD, etc. Make sure to check both Dell Home and Dell Small Business, since they are separate divisions that run separate product lines and pricing structures/discounts.
These are some of the deals Dell Home is running at the moment, though I'm not sure if they apply to Canada too:
http://bensbargains.net/merchants/6/Dell_Home_Coupons/
And here is from Dell Small Business:
http://bensbargains.net/merchants/43...iness_Coupons/