Thank you for this detailed response. I think I can justify the cost of the oil change, but the cost (and lack of availability) of spare parts makes me nervous. I still find myself so drawn to this car, just because of its looks, features and size. Unfortunately I cannot consider a bigger car right now, so my options seem to be limited.
The HVAC point is a bit concerning. I wonder if this has been improved in the new facelift launched a few days ago. I know the Puretech issue still remains unfortunately.
I agree with your point about the sunroof being a fairly useless (and at times unwanted feature) but the illogical part of my mind is insisting on it since it's kinda been a lifelong dream of mine to have.
I will probably go and look at the new 2008 and HR-V next week and make my final decision.