Experience tells that SITEX is not a camera-oriented event. And cameras are usually sold at their original prices in such events. So no big deal really.
Best is to go Cathay, TK foto etc to get better deals and avoid the human jam.
SITEX better? Unlikely, but not impossible. You can start having a look at the price lists here in CS. Plenty of information about the usual packages (body+kit lens) and prices for lenses. So you can get a feeling for the prices. But such events only work for the sellers - especially if people get excited (and distracted!) about "freebies". But being distracted is the last thing you want to become when it comes to spending a lot of money, right?
Check the stores as recommended. Also, make up your mind what you need (functions, model, lenses, add-ons etc.). Once you have sorted out what you DON'T need it's safe to have a look at SITEX. But I prefer the quiet atmosphere of MS Color where I can have a talk to the sales guys, get some water etc over the rush and crowd of such events like SITEX.