well ... right now im using 12" FR driver as my center channel.center speaker for HT setup
It costs only Rs2500 But sounds crazily good @ its price particularly the vocals are really nice and clear.
It may have its drawbacks, but In some areas, it is even better than regular center channels in the price range of 15 to 20k
I don't even know how to upgrade it now...
(center speaker for HT setup is little off the topic for this thread any way.... )