So what does she plan on using the lappy for? You can get an extra half gig of ram for about $70 installed at the time you purcahse the lappy. The acer you mentioned sounds like a fine laptop for daily use.
online school, internet surf, email, ebaying, etc. nothing to demanding. she always has like 10 things open at once and gets pissed when stuff slows up can't stand waiting for the boot up. also, how hard is it to install ram yourself?