Not knowing your old parts I can only take a guess here... I'll post one over budget but with better parts and one at budget with lower performance. You can shave off dollars but I'm not going to recommend you lower quality components.
PCPartPicker part list:
http://pcpartpicker.com/p/h4vVJx
Price breakdown by merchant: http://pcpartpicker.com/p/h4vVJx/by_merchant/
CPU: Intel Core i5-4460 3.2GHz Quad-Core Processor ($174.99 @ SuperBiiz)
Motherboard: MSI H81M-P33 Micro ATX LGA1150 Motherboard ($45.75 @ OutletPC)
Power Supply: EVGA SuperNOVA G2 550W 80+ Gold Certified Fully-Modular ATX Power Supply ($59.99 @ Newegg)
Total: $280.73
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-02-25 20:18 EST-0500
PCPartPicker part list:
http://pcpartpicker.com/p/6CVYnQ
Price breakdown by merchant: http://pcpartpicker.com/p/6CVYnQ/by_merchant/
CPU: Intel Core i3-4170 3.7GHz Dual-Core Processor ($114.89 @ OutletPC)
Motherboard: MSI H81M-P33 Micro ATX LGA1150 Motherboard ($45.75 @ OutletPC)
Power Supply: EVGA SuperNOVA G2 550W 80+ Gold Certified Fully-Modular ATX Power Supply ($59.99 @ Newegg)
Total: $220.63
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-02-25 20:28 EST-0500