Will this build be suitably cooled for stock speeds and overclocking?

Thanks TheBigTroll for the alternative build. Some food for thought on there.

Thanks StonedGamer. That fan config makes sense.

In case anyone is interested this was my reasoning for each part:

Intel Core i5-4670K 3.4GHz Quad-Core Processor - Can overclock. Don't need i7 and Hyperthreading for vast majority of work. Cheaper.

Corsair H90 94.0 CFM CPU Cooler - Did not want a beast of a copper heatsink. Don't want to damage board when moving PC or installing for that matter. Reviews say it is quiet, and 5yr warranty. [1] [2]. Looking back at reviews, there may be others that are quieter.

Asus Z87-PRO ATX LGA1150 Motherboard - This was the hardest choice. All the motherboards seem the same yet different. Narrowed it down to the following citeria. Fanless, good audio - preferably isolated, plenty of USB3 ports on rear, can overclock. The inclusion on wireless and bluetooth was a bonus, and may be useful when doing development work.

Corsair Vengeance Pro 16GB (2 x 8GB) DDR3-1600 Memory - Most apps only need/can only use up to 8GB. However, doing game dev I am more likely to be using multiple RAM heavy apps at once. Experience has taught me that 16GB is a minimum. If I need more, I have 2 free slots.

Samsung 840 Evo 250GB or Pro Series 256GB 2.5" Solid State Disk - Previous research led me to believe Samsung is one of the best and is also affordable. Evo looks to be as good as Pro, but cheaper [1]

Gigabyte GeForce GTX 760 2GB Windforce rev2 Video Card - It quieter than competition [1]. I was originally considering a Gainward Phantom 660Ti. But this seems better.

Fractal Design Define R4 (Black Pearl) ATX Mid Tower Case - Reviews consistently say it is a great case and quiet: [1], [2]

SeaSonic 660W 80 PLUS Platinum Certified Power Supply. Seasonic in general had good reviews, and various forum posts said that it is a great PSU and quiet.

LG Blu-Ray RW - Wanted a Blu Ray drive that can write Blu Rays. Read somewhere that LG is quietest.

Microsoft Windows 8 Professional 64-bit - To run the Windows Phone 8 emulator you need Windows 8 Pro. MS has to shift those licences somehow. If not for dev work, would have stuck with win7 [1]

Dell U2412M 60Hz 24.0" Monitor - The more pixels the better for dev work. Height and tilt adjust is a must. Some monitors have strange ideas as to what is an acceptable position. Vertical option is a bonus. Is great having a 2nd monitor vertical for reading. Ideally would go for a 27" 2560x1440, but don't have room on my desk, as iMac is taking up most of the room. May change my mind on this monitor. Need to properly measure up the physical size of it and others and the space that I have.