MattNH "That's a great idea sagem. Then they'd see loads of near identical thread headings & the constant same advice given time after time after time after.......etc. Regards "

@Matt That made me smile!

@Miou, Can't help you on density, but I would recommend a front ventilation of upwards lift, to conform to how you currently wear your hair.
When you talk about 'good' & 'bad' hair days, I do know what you mean, but from your pictures, it looks more a case of good & bad lighting.

You really do have a considerable amount of hair left. Using a good quality concealer on your crown area would make it look like it does in pics #3 & #4.
I actually preferred your idea of starting out with just a front partial.
But obviously, the decision is yours.
Good luck.