Hey Subhayu, First of all this has been posted in the wrong section. Be more careful next time...
Hmmm...You havent specified the needs for which u are configuring ur PC. Anyways, its good to know that you have decided to go in for an AMD based system. AMD 64 bit processors are "the" things to go for looking at todays scenario....
OK, Coming to ur question, for AMD there are 2 options...You either go i for a 754 pin mobo (outdated)...Or else you invest in a 939 pin mobo (future proof atleast for the next 3 years)..
I will give u the options available for 939 pin mobos:
1. ASUS A-8NE (No on board grafix...Costly...But overclocking possible)
2. MSI RS 482-IL ( Decent ATI on board grafix solution...Very reasonably priced....No overclocking possible.)
3. Asrock 939 Dual mobo...I think thats what it is called..
4. Other lesser known boards like winfast etc...
In my opinion you can go in for the ASUS board but then u will HAVE TO think of an external grafix card which can add an additional hole in ur pocket......
ELSE the best bet for AMD based system is MSI....Although it doesnt allow over clocking, the board gives rock solid performance...The on board grafix solution is decent enough..I play resource hogging games like FEAR on my system with absolutely no problems...
So in my choice....Look for da best...Leave back the rest....And the best is ......MSI RS 482 IL