So BoogieDowner has profiled this artsy old piano factory down in Mott Haven a few times in the past. It looks like the rental price has been moving all around, but is finally settling lower. In August a loft here was listed at $1800/month, then in December we saw one floating around the interweb listed at $1375/month, then it took a brief uptick to $1475/month in March, until gravity grabbed hold and brought it back down to its current price of $1350/month.
Mott Haven does have some cool stuff going on. There a small but growing art scene (who do you think is living in these lofts?). There is some great grub/imbibing around (Bruckner Bar and Grill, Alexander's, Pio Pio, Santa Clarita etc.). And you'll be living in an old piano factory...but really the building itself looks pretty cool. The transportation is nice with the 6 at 138th and 3rd Ave or the 4/5 at 138th and the Concourse.
What's really cool about this listing is that it actually gives a pic of the roof deck. Pretty serious outdoor/common space for a rental...