I've actually build almost this exact build twice now and neither time did I use an aftermarket cooler, and there are zero problems with temps.
PCPartPicker part list:
http://pcpartpicker.com/p/3HLZx
Price breakdown by merchant: http://pcpartpicker.com/p/3HLZx/by_merchant/
Benchmarks: http://pcpartpicker.com/p/3HLZx/benchmarks/
CPU: Intel Core i5-4670 3.4GHz Quad-Core Processor ($204.99 @ Amazon)
Motherboard: MSI H87-G43 ATX LGA1150 Motherboard ($74.79 @ Newegg)
Memory: G.Skill Ares Series 8GB (2 x 4GB) DDR3-1600 Memory ($69.99 @ Newegg)
Storage: Crucial M500 120GB 2.5" Solid State Disk ($66.99 @ Amazon)
Storage: Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive ($54.43 @ OutletPC)
Video Card: MSI GeForce GTX 780 3GB TWIN FROZR Video Card ($492.98 @ SuperBiiz)
Case: Corsair 300R ATX Mid Tower Case ($59.99 @ Micro Center)
Power Supply: Antec EarthWatts Green 650W 80+ Bronze Certified ATX Power Supply ($76.98 @ SuperBiiz)
Total: $1101.14
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2014-05-11 01:09 EDT-0400)
Same RAM, ssd, hdd, gpu. Both builds have a 4570 instead of 4670. Both builds use B85 motherboards. Both builds use Seasonic psus(one Antec)
One build uses $50ish cases with 4 fans.
No issues.