I'm needing to buy a PC laptop mainly for word processing and internet use. I'm on a budget, so can spend up to $600 max (preferably tax included, Can $), and would be delighted if it would last a good 3 years. Any recommendations or suggestions would be welcome. Also appreciated: any thoughts regarding the value of additional warranty purchase. Likely don't have the extra $, but don't want to be stuck after a year with big costs for repair.