At the request of xorl, I'm replying to this thread
I myself have the Ronza's (EnvisageIT) ebay twin studio package, for what its worth, it does the job, the package contains 2 brollies, 2 light stands, 2 300ws units and a softbox.
I haven't really had much time playing with the studio but for the price, i think they do the job fine.
I'm no studio expert, but these lights have gotten me by so far. I don't have many shots from the studio as my main subject so far has been a mannequin (only subject that doesn't complain) and i've been mainly just trying to get the hang of everything. So far i've been happy.
I am slowly expanding everything and just this week, i thought of splurging to pretty much a full blown studio, ordered my background stands, seamless paper, various accessories (snoot, barn doors with gels and honey combs, background reflector, beauty dish, refelctor holder) and two more 300ws strobes for background and hair light(from mrstudio, seemed to be very similar to what i have, but i'll find out when i get them and see how they compare to the EnvisageIT).
The strobes are probably not bowens, and i'm a firm believer in you get what you pay for, but after seeing A LOT of studio stores in shopping centres, 90% of them use one form of chinese branded strobe, wether its fotogen, qihe, fotodiox, etc they pretty much come from the same factory from china.
I don't have the link with me at the moment, but when you look at the strobes from dragonimage.com.au, studiolight.com.au, EnvisageIT, ozplaza and a lot of the ebay ones, most of them look very similar to the chinese manufacturer i've got a link for (again, i'll update this post accordingly)
That being said, if you can afford bowens, by all means go for it, but for the price of ozplaza's 600ws strobes, it seems mighty tempting to go for ozplaza as oppose to bowens, they both take S mounts so accessories won't be a problem.
One thing that has been mentioned is portability, the Gemini's has a powerpack that makes the strobes extremly portable, however if that is not an issue, if its just for the home and portraits, then i don't see the need for the bowens kit (haha i suppose that can also be said about L series lenses and high end cameras)
If you guys have any questions regarding the flashes let me know.
I really wish firefox worked at home, i still get banned