POISED on the brink of power, the BJP is faced with many hard choices. Easily the hardest of them is to find a finance minister to balance the party's nationalist approach with the global identity India Inc is struggling to forge. The shortlist of candidates shows that the party is even more uncertain about the incumbent than the Indian electorate has been about its representatives. And the confusion is least to do with the unexpected defeat of Jaswant Singh, the liberal financial face of the party and finance minister in its 13-day government.