What about these models?
http://h50025.www5.hp.com/hpcom/in_e...75summary.html
They are 64bit!. Dont know about the prices. If they cost below 60K they are a bargain.
IBM thinkpad is a highly rated notebook, but the price in US(when launched) is around 1500$, I doubt its for 52K in india and for your non-performance needs its a good buy, infact the best at that price. The IBM india site lists it at 87000.