You are also picking the most expensive place to live. A big 2 bed 2 bath duplex with a porch is $2100 up in Harlem (near 125th). That's $525/month split 4 ways, also a very nice apartment (3 blocks from the 4/5/6 train).

If you work between lower manhattan and 33rd st, you can live in Jersey City and rent a huge 3 bedroom for $1500 ($500 split 3 ways). Commute time is 15-25 minutes.