Hi, just finished reading your post from first to the last page. What I can say is, you have a nice cosy house and your ID did a good job~!! haha.. But really hope you post more pictures, esp the lightnings at the night time.
I have bought a standard hdb unit at yishun, layout almost similar like yours but i personally don't really fancy the cove lights as it may become a dust collection area in future.. hah~~ But I really like your LED lights alot, guess it may cost a bomb to me ($68 per set) as I will need more LED lights unless I install a mixture of downlights and LED lights. I also never realised that HDB will install the basin, showerhead and false ceiling in both the toilets for us till I saw your pics..
So I look forward to your pics, take more more okie.. all the rooms and toilets overall layout.. =P