For the moment at this price the next one is imo a very good choice,
PCPartPicker part list:
http://pcpartpicker.com/p/vqX
CPU Cooler: Xigmatek Prime SD1484 90.3 CFM Sleeve Bearing CPU Cooler ($24.90 @ Amazon)
Total: $24.90
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-18 07:45 EST-0500)
Edit:
well you just don't believe it,the price went up again,so forget it.