changing from rotel and peach to plinius 8100?

Hello all, I am going to replace my rotel 980 power amp and my juicy music preamp, for a 8100 plinius. I have been reading quite a bit about the plus sides to intergrated amps and am wanting to try it out. Before you say anything I know the 8100 is quite old but my thinking is it will give me a taste of how a good integrated can sound, am I correct? My question is what changes should i expect? thank you very much. Scott