There have been several recent pre-launches in South Bangalore, by builders like the SJR Group, Purva, Mantri, Godrej, Radiant, SMR, etc., which might fit your budget. One project I’ve heard good reviews of is Woods, based off Hosur Road. Another is EdgeWaters, close to Sarjapur Road. You can read more about these projects at http://www.bren.com/woods-index.php and http://www.bren.com/edgewater-index.php. More information is also available at http://www.commonfloor.com/bren-woods-bangalore/povp-8jd5s1 and http://www.commonfloor.com/bren-edgewaters-bangalore/povp-foc84h.