As far as i feel buying a 1.1L Getz is just like owning a better looking Santro. Hyundai has just happened to have the same engine in the Getz as well in order to increase its fuel efficiency figures. Thats it. So the performance for this one shouldn't be much different from a Santro's.
What you could definitely look at in your budget should either be a Swift (petrol or diesel would be your choice - since both are great cars). But if you're a Hyundai fan you definitely need to have a look at the newly launched i10. Its really creating waves and is probably one of the strongest competitors in the small car category at the moment. It looks fabulous, has great interiors and is powered by a 1.1L 67bhp iRDE engine which should be equally fuel efficient. And it'll fit your budget perfectly. Do take a test drive and see if you like it.
But if its both great fuel efficiency figures as well as loads of power that you're looking for in your new car, then nothing beats the Swift DDiS (diesel). The best part is that it just doesn't feel like a diesel car at all. Trust me !!
To actually determine a winner just drive these cars around once and let me know which one really really stands apart from the crowd.