If u want to study at a reputable Private school, then its
definitely SIM. They have a arm UNISIM, as well as another arm
which offers overseas degrees, such as UOL and RMIT. I used to
study there, and even though i drop out from there due to personal
reasons, i still think that the organization is run rather
efficent. MDIS is also quite reputable. Plus the fact that they
have just opened up the rather expensive campus at Queenstown goes
to show that they have the finances to last for quite a while, not
like some private schools that have the potential to close down due
to financial reasons.
I personally recommend u the 2 schools above, but its ur ultimate
choice to choose from any school other than those 2