Def stick with Arri on a kit like this. The Softbank I kit has everything (except C-stands, etc) that Brian mentioned wrapped up in one kit. 1K open face, Small Chimera, (2) 650 fresnels, (1) 300 fresnel. I'm not going to say anything about the other softbox brands, but let me just recommend to stick with Chimera. Mainly for the same reason I would stick with Arri. It's standard gear that is built well and will last.
Chimeras on the 650s will cut your light significantly. If you need to cut a bit of light and even out the green a little, some diffusion across the doors of the fixture should do the trick. You may have to flag a bit more for spill, but no worse than with a Chimera. 650s will not fill a standard Video Chimera either, and no sense in jumping to Quartz or Daylight banks that cost more than the fixtures.
Now, let me throw another idea at you. I would seriously consider a Kino Flo option. You may spend a bit more, but I think the ease and reduced power & heat would be worth it. A setup as simple as a Diva 400 for key, two Barfly 400s or 200s for screen, and a Barfly 100 for backlight would be awesome. You can get green (or blue) tubes for the Barflys which make it considerably more effective for lighting the screen, plus you can put them much, much closer to the screen. You can plug all of this into a single circuit, probably with all your video gear.