Wait for Xperia M. It looks lovely..Looks like a miniature Xperia Z from the sides... Its a 4 inch phone..1 Gb RAM, S4 Plus Soc , same battery as Xperia L 1750 so expect it to last longer than the L
In case the Xperia M doesnt release soon---
Above 15k go for Xperia L (its 16.5K now)
Below 15k go for Lumia 620 or Samsung Galaxy Advance (almost 2 yr old)
Cuz in the budget phone arena, Androids are sh*t other than Sony's phones.
Or you can go for small brands.. The Lava q800 is a kickass product. look it up on the internet.