I have an old Toshiba M55-S325 laptop I bought in 2005 and I was wondering if it would be worth upgrading the memory from 512MB to 1524MB. It currently has one 512MB integrated and I have the option of buying a 1GB stick for 30 off of Amazon. My question is would I see an improvement in usability? Keep in mind we only use this laptop for web surfing and basic word processing/spreadsheets.