"definitely that's what I like to play when I'm playing standard - I want to be able to bid diamonds because bidding good suits is important in bridge" - Meckstroth's opinion on weak 2 diamond
4♠, assuming partner is showing both majors. Ideally I'd like a bit more information on (a) how we use X in this sequence, and (b) opponents' pre-empt style, but without that this is what I'd choose. It should have good chances, and I see no reason to suppose we're taking 500 from 3♦X.
3♠. Unless p's takeout doubles are VERY sound (and whose are these days) 3♠ should be enough. If p has extra shape or values he will be aggressive to raise to four. No reason to suspect we are getting rich in 3Dx (but it would be a good shot at MP I think); 3N is a total gamble and could easily miss 4S.
'In an infinite universe, the one thing sentient life cannot afford to have is a sense of proportion.' - Douglas Adams