My Dell Inspiron 15 3537 with an i5-4200U processor and no graphics card was becoming way too slow for my needs. So, I decided get a new PC, and build it myself. I am on a pretty tight budget: €550, which is approximately $600 (USD).
What I use a computer for:
Web browsing (obviously)
Programming
Running very CPU intensive programs
Casual gaming
Parts:
PCPartPicker part list: http://pcpartpicker.com/p/pbW4K8
Price breakdown by merchant: http://pcpartpicker.com/p/pbW4K8/by_merchant/
CPU: Intel Core i5-4590 3.3GHz Quad-Core Processor ($189.99 @ SuperBiiz)
Motherboard: Gigabyte GA-B85M-DS3H-A Micro ATX LGA1150 Motherboard ($48.98 @ OutletPC)
Storage: Samsung 850 EVO-Series 250GB 2.5" Solid State Drive ($86.99 @ Amazon)
Case: NZXT S340 (Black) ATX Mid Tower Case ($63.99 @ SuperBiiz)
Power Supply: EVGA 500W 80+ Bronze Certified ATX Power Supply ($35.98 @ Newegg)
Monitor: Acer H236HLbid 60Hz 23.0" Monitor ($129.99 @ Best Buy)
Other: Some Kingston 2x4GB DDR3 1600 memory I have laying around (Purchased For $40.00)
Other: Windows 10, getting this from Kinguin ($20.00)
Total: $615.92
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-02-28 03:13 EST-0500
I went for a 500W PSU, even though the build only uses about 150W. This is because I plan to buy a graphics card later on, when I have enough money. Not really sure what I'll buy yet, I was thinking of a GTX 950. (somewhere in a $100-150 price range). For now the iGPU on the i5 is just fine; according to benchmarks twice as fast as the iGPU on the i5-4200U
Full part list: http://pcpartpicker.com/user/RobinMC/saved/#view=L7Wkcf
Note: Yes, I don't have any drives other than the 256GB SSD. I don't need lots of storage; that is what I use my NAS for.