monitor audio silver 100

Hello would like to know your advice if to replace my old monitor audio Bronze B4 floor speakers with monitor audio Silver 100 bookshelf ? Room size is medium 4mX5M Is it a good upgrade ?

I have a pair of Monitor Audio Silver 100 and am wondering what would be a great pairing for them in the "budget" realm . What I am really asking is - if someone who already has them and have paired them up and thinks it is a wonderful match, could please share it here. Please don´t offer...