our plumber correctly installed our wall mounted spouts over the centre of the basin ie water directed to the plug hole but make sure that the basin is mounted forward of the vanity and spout is shorter rather than longer as the water can spurt forward if turned on too hard by unsuspecting guests

Your renovations are well underway, so after seeing the small floor plan and that the vanity is on an internal wall and you apparently still want the Shaving Cabinet. Having cavity brick walls I would get your brickie to remove a section of the brick wall so that the shaving cabinet can be recessed back into the cavity, this will overcome any concerns you have about bumping your head, this opening can then be patched along with other walls. I would take all of your photos and measurements to someone like Reece to pick a hand basin to fit,, I would also keep in mind that if say the width of the vanity is around 900 the shaving cabinet would match that width and you would end up with say 2 x 450 mirrored doors, which puts the mirror join in the middle and in your face when using the vanity. cheers

However, if you are just after looks, then the photos in your link, appear to have a 350mm basin which is leaving the 100+mm between front edge of vanity and basin. It does look better, but is that size basin too small for use?

Whilst looks ate important functionality is key so you are right to question your choice. Your plumber can advise further. But mine said tap needs to reach over the plug whole. Tap should not obstruct you when you lean over to wash face, rinse mouth, wash hands etc. splatter would be reduced by a higher bowl but it is about the bowl depth and the water flow rate, which can be turned down by your plumber on commissioning the tap. Also consider if it will obstruct opening if a cabinet door on wall. Good luck