I would say a tektro cross lever as well.. You can get them for cheap on nashbar. In fact, the nashbar branded ones are actually tektro 2.1 cross levers. IMO, these are a whole lot easier to put on and take off than a bmx lever, since the clamp has a hinge. With these levers, you can route the cable on either end...giving you more flexibility on placement for your drops.
That being said, if you really want a bmx lever, I have one that I'd be willing to let go. PM me.. i'm in boston as well.