Why did you lower your gpu? you are confusing me now, if you already soooo much want a micro atx case go for something from intel, amd just sucks with micro-atx, also the cooler is stupid, here i'll give you a build:
PCPartPicker part list:
http://uk.pcpartpicker.com/p/2ruoV
Price breakdown by merchant: http://uk.pcpartpicker.com/p/2ruoV/by_merchant/
Benchmarks: http://uk.pcpartpicker.com/p/2ruoV/benchmarks/
CPU: Intel Core i3-4130 3.4GHz Dual-Core Processor (£83.94 @ Scan.co.uk)
CPU Cooler: Cooler Master Hyper 212 EVO 82.9 CFM Sleeve Bearing CPU Cooler (£23.90 @ Ebuyer)
Motherboard: Gigabyte GA-Z87MX-D3H Micro ATX LGA1150 Motherboard (£99.99 @ Ebuyer)
Memory: Crucial Ballistix Elite 8GB (1 x 8GB) DDR3-1866 Memory (£53.99 @ Amazon UK)
Storage: Samsung Spinpoint F1 DT 750GB 3.5" 7200RPM Internal Hard Drive (£34.99 @ Overclockers.co.uk)
Video Card: Gigabyte GeForce GTX 650 Ti 2GB Video Card (£114.98 @ Dabs)
Case Fan: Arctic Cooling Arctic F12 74.0 CFM 120mm Fan (£2.60 @ Ebuyer)
Power Supply: Corsair CX 430W 80+ Bronze Certified Semi-Modular ATX Power Supply (£36.68 @ Amazon UK)
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer (£13.80 @ Amazon UK)
Total: £464.87
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-12-28 10:20 GMT+0000)
I know i included a z87 motherboard with not unlocked cpu, but it sucks because every h87 or b85 hasn't got SLI support, so you can cheapen the motherboard and buy a AMD card so it could be more expandable in future if you want to add another card.