I really like Rondo, but considering how loaded the point guard position is in general, i do not want to pay Rondo 20 mil per year. That is too much.
I'd say go forward with a Smart, Bradley back court instead.
Use that money on a big man, or a star scorer when the time comes.
If Rondo wont resign at 45/ 3 years, the Celtics should trade him before the Mid season deadline.