It's really tough to recommend a good hindi film in the past few months. But sine you asked, I'll do so, but don't ask for money back if you don't like it.
1) Gangstar, loosely based on the Abu Salem-Monika Bedi love story, pretty well directed...fine performances by the lead cast and the best music of the year so far. If Pritam Chakraborty doesn't win Filmfare award this time, I'll boycott the award forever.
2) Corporate, a Madhur Bhandarkar film....watchable. I think Tabu/Konkana would have done a better job than Bips. Kay Kay was wasted. Rajat Kapur shines in a powerful role.
3) Humko Deewana Kar Gaye, a total timepass love story...but watchable. If you like Kaif (not the one jfk likes, but the heroine), then watch it just for her. Nice songs and picturization, especially the 'Fanaa' number.
4) Krrish has been released too, although I am yet to watch it. The biggest blockbuster of the year so far, lot of Matrix like stunts. And between the two directors with K fixation, I'll any day watch a movie made by Rakesh Roshan than KJo.
I am not recommending any old movies or movies that were released more than 2-3 months ago. Btw, have you watched 'Haazaron Khawaishein Aisi'? Watch it if you haven't. And also '15 Park Avenue'.