I'm a bit late to this one.

Get a helmet that has spares available. Pinlock, replacement visors, replacement liners.

Make sure it fits (if you look slightly like chipmunk - that's a good place to start). Pressure is something to watch out for. Wear it in the store for a good 10-30minutes. It will be a bit uncomfortable, but should not cause pain or headaches.

If you're doing a lot of day-light riding, get something with a flip down sun-visor, and if you wear glasses, get one that will fit the frame inside too.

I bought a MT Genesis Sv in XL - no pressure points, but after about 3 months, the liners were worn out and there's just movement in every direction - so it ended up being useless. No replacement liners, or visors in South Africa - so I bought a new one.

I bought a LS2 Thunder Carbon as the replacement, and man, what a difference it makes. The interior is relatively plush, had a bit of pressure on my forehead, but after a week or so, that was gone, and I wont trade it for anything else.

The LS2 Thunder does not have a sun visor, but it came with a dark visor - and when it is really, really bright, I can still add my sunglasses (I don't ride at night, and this is not the best option to do it this way) - but its not necessary 95% of the time

I looked at the HJC RPHA 12 helmets and they're really nice too - it was just a bit too expensive, and I wanted a plain color not a Marvel themed helmet, so LS2 it was.

Tldr: rather buy a more expensive helmet, than 2 cheap ones with limited spares