PSU for bitfenix prodigy

Solution
The S12 is a solid pick, as are similar PSUs based on similar platforms (XFX Core, Seasonic M12, Antec HCG(M)).

Don't worry if people suggest you need/want a modular PSU for a "small" case. The Prodigy has a surprising amount of room for cables despite having basically zero cable management and it's pretty straightforward to tuck in the excess cables into the side channels.

I personally use the XFX Core 550 in my Prodigy and I'd highly recommend it due to how good it is relative to how cheap it is. It's more or less the cheapest decent PSU you can buy (ignoring the odd sale/deal), but if you prefer the Seasonic brand then the S12 isn't hugely more expensive.
The S12 is a solid pick, as are similar PSUs based on similar platforms (XFX Core, Seasonic M12, Antec HCG(M)).

Don't worry if people suggest you need/want a modular PSU for a "small" case. The Prodigy has a surprising amount of room for cables despite having basically zero cable management and it's pretty straightforward to tuck in the excess cables into the side channels.

I personally use the XFX Core 550 in my Prodigy and I'd highly recommend it due to how good it is relative to how cheap it is. It's more or less the cheapest decent PSU you can buy (ignoring the odd sale/deal), but if you prefer the Seasonic brand then the S12 isn't hugely more expensive.
 
Solution
Easily. There's very few "extras" on ITX systems which can present any kind of serious power draw which is why the very popular 450W Silverstone SFX units have been powering even top end graphics cards in compact builds.

If you were overclocking the CPU or seriously overclocking the GPU then you can start to potentially make a case for spending more or getting more capacity, but a lot of that is for comfort rather than necessity.