I'd bid 1♠ because I think it more or less will achieve the same thing as 2♥ while being more descriptive. Any number of good things can happen: Partner raises spades, partner bids NT and I can raise ♥, partner jump shifts and I can bid 4♥, partner bids again after 1♥ 1♠ 2m 2♥. The only concern is when partner has a hand that makes game good opposite this hand with 3♥ but not this hand with 2♥, and I think that's a pretty small target.