Your only choice is to get a MSI RS-480 motherboard (radeon xpress chipset) for around Rs.4900 . You might be able to haggle to somewhere around Rs.4600. This is the cheapest you can get for that processor.
An NF4 based mobo will cost you atleast Rs.6400
My vote goes to DFI Lanparty Ultra-D or the SLI edition - an overclockers dream board. Don't know if EPOX is available in India otherwise their non-sli edition sells for around $90= Rs.4000
i agree with siriusb .. the cheapest nforce 4 board will atleast set u back by 6k .. u can try for brands like Foxconn n ECS if u want a cheap n decent board .. but i recommend the asus a8n-e if u can stretch ur budget to about 6500/-.