What are you looking for 5.1, 7.1, standard stereo? For that price I would buy something second hand and 5.1. Possibly a Sony or Pioneer or something similar.
I buy a lot of stuff from Cash Crusaders and have never been dissapointed. They have a 3 month warranty that will cover everything. You should be able to check it out in that space of time.
I bought a 5.1 Sony from their Sea Point branch about 2 years ago. I paid 5K for a set of brnad new Mission speakers and have never looked back.