B&W HTM1D3 vs HTM2D3

I am curious if anyone has upgraded their B&W center speaker From HTM2D3 to HTM1D3.  If you have,  I would like to know your impressions  and if it is worth the $2K price difference.  I am primarily 2 channel, but also listen to many Blu-ray concerts and other 5.1 music.  The larger speaker has larger bass and mid range drivers so I would expect vocals to have more clarity, as well as deeper bass.
i previously upgraded to 802D3’s from 803D3’s, but am still using the smaller center channel.