Depends on what you need and your budget....

If for fuel economy, then get the City

If for space, probably the Optra sedan or wagon

According to another thread here (you can use the search function to look for it), the Optra said to be a gas guzzler (even for a compact sedan) and quite a number also experienced some defects on their units.

An alternative, if you are after space and fuel economy all in one package, then the Honda Jazz might just fit the bill.