Maxcom decrease their rates recently, according to todays DAWN, now maxcom available for:
256K = RS 1200/mo
512K = RS 18/mo
1MB = RS 36/mo
All packages comes with unlimited bandwidth/download and right now they are offering free Modem and installation too..
I am seriously thinking about switching to maxcom as I mostly heard good feedbacks about them, so you also better checkout maxcom too..