Hi neen I'm new to all this also. I also live on the GC and was looking at those clinics too. My GP has recomended Monash because Dr Ong who is there is supposed to be really good. He specialised in fertility straight up instead of being a GYN first and then turning to fertility. She said she has worked with him before and he is great. Haven't heard much about City Fertility. I also looked at Fertility GC who did my lap a few years ago, they seem to be more expensive again though.
We are doing IVF for the same reason, DH has no sperm in his semen (not sure of cause yet but he hasn't had a vasectomy or anything) so we will need to do TESA and ICSI. Providing of course they find some swimmers in there somewhere!
Keep me posted on how you go with the clinics, and if I go to Monash before you i'll let you know what they are like.