Tube buffer ???

I got a Creek audio Destiny amp and I think to add tube buffer on the tape monitor to have the tube sound I miss from my previous phono. Did you think is a good cheap upgrade? Or should I look for a complete Tube preamp and use the amp section of my Creek for the moment until I purchased a power amp?

How would you use the tube buffer to help your phono sound?? This does not make sense to me.