the G13 every one is referrig to is EFI brother... its the one that you fing in 1.3 Baleno's... and as far as i know they have a very good reputation...
Remember... when going for a swap please stay as original as possible to the car i.e if swapping in a Suzuki then get a suzuki engine...
The g13 will give you good mileage if have a good foot and is reliable as well as easily available...