Hi Peter,
Once again, thanks for the comments.
The new 'Full Key' design would work pretty well across most applications. In particular I think it would work well for advertising and rental/sale/sold signs. It should work quite well on stationery but for the website I would still go with the orientation of
#77 (your rank 1st). I have tweaked the waves a bit on version #114 to make them flow more fluidly. I also think it would translate well to your idea of RoomQuays by simply replacing the 'City' text with 'Room', retaining the wordplay and maybe adjusting the colour scheme thus creating a sub-brand in line with the parent company.
Also see entry
#115 as per your request of #107 variant with thicker line weight and smaller hole to enhance the keyhole image.
Enjoy your images!
Cristian