You don't necessarily need a video card for using Photoshop CC. The i5-4460 has integrated Intel HD4600 graphics. It will work fine with Photoshop and will run the screen no problem. It's definitely sub-optimal for 3D work and games, but for 2D Photoshop work, it'll be OK.
As for the PSU and Casing, I'm just going to buy whatever they have available that suits my computer. But will I need a CPU cooler or a Wireless Network Adapter?
Oh, an a question about gen 6 processors, are there any pros to upgrading to Skylake? I noticed that the i5-6400 is about the same price as an i5-4460. But the changes to the MoBos and RAM I would need seem too expensive and tedious without much improvement.
I don't recommend buying the cheapest generic power supply available. It'll likely cause more problems. Stick to reputable brands (Corsair, EVGA, XFX etc.) and choose a well designed case with good airflow. You don't need an aftermarket CPU cooler. One is supplied with the processor, which is designed to work with it. Aftermarket coolers can be more efficient, and run with lower noise etc. They are essential for overclocking, however that is not really applicable to the locked i5's. As for the wireless network adapter, do you need to connect to a wireless network? If yes, then you need one. If you will be using a wired connection then no.
Skylake processors come with more advanced integrated GPU's. The HD 530 seems to be roughly comparable in graphics performance to AMD's top end APU's like the A10-7870K. They offer roughly 10% per clock better CPU performance compared to Haswell, while using less power. Not all the motherboards are expensive and not all of them require the new DDR4 memory (but I understand low voltage DDR3L is recommended for Skylake).
An interesting CPU for this type of build could be the Broadwell i5-5675C, which has integrated Iris Pro graphics which give comparable performance to a GTX 750 card, while consuming similar power levels to the Skylake i5's. However, from what I can see it's neither widely available or cheap, unfortunately.
Example using Skylake without GPU, with 16Gb memory:
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2015-09-18 14:19 EDT-0400
Edited by jonuk76, 18 September 2015 - 01:19 PM.