Umar bro, if you want to buy nexus one then homeshopping is offering it for 26,990 
And there is not much difference between desire and nexus one. Its just that desire has physical buttons plus optical track pad and nexus one has got capacitive buttons plus track ball. Other that this there is no difference as far as i know.
So instead of spending 4-5 k extra for desire, i'd say go for nexus 
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