I think the Moto G goes for around 150 here you can get cheaper online. There is a new version either coming or just out with 4G and an SD card slot. It runs the latest Android software and is getting the latest kitkat updates I think the S3 would be a little behind.

You can compare them on gsmarena and also check the reviews of the Moto G. I own one myself as does my daughter, her boyfriend and his dad. Really a decent phone for the price.