Fully agree with you. I do think the Timewalker design is very unique and worthy to be an icon for Montblanc. The Twinfly has their inhouse twin flyback movement which makes it even more special. The Greytech twinfly ices the cake!
Good point on large Panerais. I should reconsider. Thing is I am mostly used to smaller and more classical watches. But maybe I need some diversity in my collection 
Always easy to find an excuse to get a new watch hehe
Cheers
Robin