I am a new owner too, and i love the car like you do!
The clunking sound from the back on bumbs is something i have too. I realized that it is the little link rods at left and right of the anti roll bar, they are just a little loose, but they should be 100% tight. The local Honda dealer wanted 95euros (80 pounds) for each (they are not very bright people...) but i found them online in UK for much less:
The smoke might also be the PCV valve, that is very cheap. I would start from there.