Wireless is standard and even five year old computers are more than capable of handling anything the internet can throw at it so I'd recommend just wandering around the local shops that sell computers and picking one you like the look and build quality of (if you write a bit then be sure to try the keyboard as some laptops can be abysmal), as well as making sure they don't have any stupidly bright LEDs or badly placed ports, if you see any slightly above your budget that you like then you can probably find them cheaper online.
Dell have a better reputation than Acer, although as you're after a bargain price one they're probably going to be fairly similar in plastickyness.