2 channel + HT suggestions

Hi All - I’m limited to one room for my set up so I needed to solve for two channel and HT.  For this reason I went with a krell theatre 7 HD for my amp, which I now know is the weak link. The rest of my system includes PS Audio BHK pre (ht pass through) PS Audio DSD, Roon into Matrix into DSD, B&W 805 D3 + Rel sub.  
 

i’m fairly set on a pass labs 250.8, which gives me optionality to scale a 2 channel room later with larger speakers, but for the current set up I then need to solve for the center channel.  I’m only running 3 channels so the Krell is useless. What are your thoughts on powering the center channel?