For my 2C worth - make sure you are trained by experienced instructors, rather than fresh guys - always insist on being trained by the top guy, and try go for a school that can place you in the industry once you have trained. Remember that the school is a business so they will say alot to get your money.
In Capetown there are a couple of schools I know of. Try:
www.base4.co.za they have a great instructor called Frank, I think all the other guys are low timers.
www.heli.co.za run by Jannie who has a very good name in the industry.
Other than that try some people in Joburg like Alpine or NAC - there are loads of them up there. For a fresh Comm I think the Joburg guys are in a better position to place you in work once you have finished - like Nedstar type stuff.