Powerful portable strobe/power pack?

I've been looking for a really portable option like that for a long time, but sadly, the only options available are all very expensive.  Right now I have a case with 3 Einsteins, 3 Vagabond Minis, reflectors, grids, cords, and bulbs all in a 22" hard-sided wheeled case.  It's reasonably portable and very powerful, but not lightweight -- probably runs about 30 pounds.

The only solution I have found that is smaller without being outrageous is the Impact LiteTrek lights:  http://www.bhphotovideo.com/c/product/695135-REG/Impact_10052520_LiteTrek_4_0_Monolight_and.html

They are fairly powerful and reasonably small, but only slightly smaller than the Einsteins, so I figured I wouldn't bothers.  The LiteTreks are also sold under under CononMark DL4.0 (which might be cheaper) and Photoflex TritonFlash (which are some reason literally twice the price).  CononMark is the real manufacturer of all of them so they aren't really knock-offs.  If you're starting from scratch, these might be a nice option.  Piecing together used gear would be the only other alternative below and investment of several thousand dollars.  If I had money to burn, I would get  a set of QFlash lights and batteries -- best reputation on the market, but you pay for it.