I've managed to convince my landlord to rent to me the rooftop storage room in my building for my use as a studio. The room is about 4mX4m with one small, opaque-glass window.
The plan is to set up a tabletop studio for product and still life, as well as some portraiture. The size of the room is my main limitation right now.
I have one Nikon SB600. A large softbox - for an Alien Bee AB800 that I blew up a few weeks ago

and plenty of make shift reflectors and gobos.
What kind of second light should I get? what brand? How much might I expect to pay? Where can I go/Who can I call? And I'll also need a couple of light stands...
Any thoughts?
-CW-