Is it worth it to add a 2 channel preamp???

I have the urge to add a 2 channel preamp with a home theater bypass to my home theater My system consists of the following:

CD Ayon CD1
Processor Anthem DV
2 Channel Amp Gamut D200i
Speakers Gamut M5

For those why have added a quality 2 channel preamp to their home theater systems:

What were the improvements?
Was it worth it?
Would you do it again?

Thanks.