Verglas,
Did your costings include ski lessons? I'm ashamed to admit that lessons are a very large item on our bill. We're all having different sorts of lessons, but it's working out at an average bill of £250 per person for 6 days. My lessons are the most expensive - 330 euros for 6 days, morning and afternoon

.
The lift pass is the other killer - 216 euros for 7 days for the Courchevel one.
The accommodation, transfers, and train cost about £600 per person.
I haven't costed out food because I'm not planning on spending much more than we do at home (apart from the fact that I suppose the basic ingredients will cost a bit more in the supermarket). We will be cooking in the apartment.
Borovets is definitely much cheaper than Courchevel. They are at opposite ends of the spectrum. We started with Borovets, and then moved up the scale in both quality and price, once we could afford it.
Ally