Alien Bees, White Lightning.
You gotta pay attention to the Watt Second (w/s) rating of strobes, that's a measure of how much power they put out. White Lightning puts out a 1600WS monoblock head which is pretty badass.
Profoto is running a deal on their new Compact line of monoblocks, something like 2 2200ws heads, stands, umbrellas and bag for relatively cheap.
If you're not looking to spend thousands of dollars, what's wrong with picking up some Nikon speedlights? SB-28 FTW. Oh and Vivitar 285's too. If you're not looking to kill daylight, you don't need huge amounts of power.