Center channel speaker recommendations

A post by geek101 spawns this post concerning center channel 3.1 vs 2.1 systems. My wife and I always have problems with hearing and understanding dialogue while watching movies. Granted I’m 69 so hearing deterioration is a factor but I get the complaint from those much younger than myself. I’d like to get recommendations for a center channel speaker, preferably self powered to be used for movie viewing only. 

My current setup is an Oppo 205 using its preamp going into a pair of Kef LS50W’s. Due to an anticipated move I’ve stored my main system of Magnepan 20.1 speakers driven by a Bryston 14b sst2 amp. This will be my main system when we move. We watch a movie maybe twice a month so I’d like to keep cost low, somewhere below $1,000. 

Thanks in advance for recommendations.