2NT shld be correct openin, i think. 1. No reason to show diamonds, we don't seek 6 or 7d after partner's pass. 2. We prepare to play from our strong hand. 3. We could find our spade easy. But we could not find 3d. So? Probability of 3d is not high. May be 3c or 3H... But now, after 1d opening we can hide our spade and expect spade lead. 3NT with spade fit better than 2/3NT from weak partner's hand after club lead.