http://pcpartpicker.com/p/F3JvBm
This looks good, still it is a little OVER your budget.
You can decide on what to remove i guess. If you have OS, you are fine, else you can remove SSD for a start.
You could change monitor, if you are used to 21.5 or 22'', still 24 looks good.
Also if you don't play fast paced games, some 5ms monitors will do the job, depends on what you play.
About PSU, 550w and 650w at the same price so its better to have a little of advance, if you plan to change CPU and VGA in future.
RAM is worth it, 16G kit. Yes you can get 8GB also, cheaper.