Really nice computer here: http
/www.amazon.com/HP-15-p030nr-15-6-Inch-Special-Edition/dp/B00KB3MXH4/
$609 which is about your budget. And it has
AMD A8-5545M 1.7 GHz 4 core CPU,
8 GB DDR3L SDRAM,
1 TB 5400 rpm Hard Drive, 15.6-Inch Screen,
AMD Radeon HD 8510G graphics,
Windows 8.1
I'm jealous that I didn't get one of these, but... I don't want to waste some money on a new computer when I have a perfectly fine one right now.