I own an Acer Aspire myself: a $700 one that can play Crysis on all high settings! Acer is good about packing lots of good hardware into a low-price package. The trade-off for this, though, is in quality of construction and customer service.
My Aspire has a somewhat flimsy plastic casing; if you press on the back of the laptop's lid, the casing bends inward, which suggests that it's not very durable. Also, the LCD backlight has a tendency to turn many blacks into greys, so don't expect a perfect display of brightness. As for customer service...I haven't heard good things about it, though I've been lucky enough to not need it.
Check out this Notebookcheck page on your laptop's graphics card, if you're interested. Pay particular attention to the performance ratings at the bottom to get a feel for what it can do. (I hope your gaming will indeed be very light.)
ATI Radeon HD 4250 - Notebookcheck.net Tech
You might also want to Google "acer brand reviews" to get other opinions.