That being the case, how does this suit you?
PCPartPicker part list / Price breakdown by merchant
| Type | Item | Price |
|---|---|---|
| CPU | Intel Core i3-4150 3.5GHz Dual-Core Processor | $104.69 @ SuperBiiz |
| Motherboard | MSI H81M-P33 Micro ATX LGA1150 Motherboard | $44.85 @ OutletPC |
| Memory | Pareema 4GB (1 x 4GB) DDR3-1600 Memory | $28.99 @ Newegg |
| Storage | Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive | $47.96 @ NCIX US |
| Case | BitFenix Neos Black ATX Mid Tower Case | $33.99 @ NCIX US |
| Power Supply | EVGA 600B 600W 80+ Bronze Certified ATX Power Supply | $44.99 @ NCIX US |
| Operating System | Microsoft Windows 8.1 - 64-bit (OEM) (64-bit) | $92.00 @ B&H |
| Monitor | AOC I2269VW 60Hz 21.5" Monitor | $119.99 @ Best Buy |
| Other | HIS HD7950 from GPUshack | $149.00 |
| Prices include shipping, taxes, rebates, and discounts | ||
| Total | $666.46 | |
| Generated by PCPartPicker 2015-03-06 22:14 EST-0500 |
I do strongly recommend upgrading your peripherals in the longer run, mind you - peripherals are, if anything, as important as the core system in terms of quality of life - but this way you've got a solid core system, and you may be able to allocate more to your peripheral upgrades when you get them.