Thanks for the info. I am getting my printer next week and wanted to have a solution for ABS. This was helpful.
Maybe i will try the Kapton Heater pad method but was also thinking of trying out this - ( Mattroberts' Heated Bed - RepRap )
and attaching the resistors to the steel plate below the glass.
Btw I couldn't find the exact size of the glass piece on the printer. is It 100cmX100cm ? or the build area slightly smaller then the glass piece. But anyways i guess ill get the exact dimensions when the printer is here.
thanks