@jagdish_p, just to put a different perspective on things, what is it that you feel is lacking in your setup? That would give you the answer as to what is to be upgraded. If you don't feel that anything is lacking, they why do you really want to upgrade something in your setup?
You did mention that your room is far from ideal. Perhaps, if you really want to spend money on a setup that you're mostly satisfied with, you'll get the most bang for the buck from spending money on basic room correction kit (diffusers/absorbers/carpet etc.).
Barring that, considering your usage pattern, I think the one other thing in your setup that will give the most improvement from an upgrade would be the source. I used to initially use the WDTV for playing FLACs, and believe me, changing to a Music PC (and later adding a CDP also) made a world of difference. A CD Player would also be a good option, provided you'll be mostly playing original CDs. You should be able to get significant improvements from just a budget of about 25K.
You did mention that your room is far from ideal. Perhaps, if you really want to spend money on a setup that you're mostly satisfied with, you'll get the most bang for the buck from spending money on basic room correction kit (diffusers/absorbers/carpet etc.).
Barring that, considering your usage pattern, I think the one other thing in your setup that will give the most improvement from an upgrade would be the source. I used to initially use the WDTV for playing FLACs, and believe me, changing to a Music PC (and later adding a CDP also) made a world of difference. A CD Player would also be a good option, provided you'll be mostly playing original CDs. You should be able to get significant improvements from just a budget of about 25K.