Kvbien, I haven't heard the gear you own. I assume the Sansui is a receiver. I don't think that you will find an amp that will make a big difference in the sound of your system. I could be wrong though.
I suggest that your best chance of putting together a system that you enjoy is to start over.
The speakers make the biggest difference in the sound of your system. I would listen to speakers at stores, audio shows or friend's houses until you hear a pair that you really like. Then get an amplifier that works well with your speakers. Then a cd player or other source that matches up with your amp.
That's the best advice I can give you. Once you get the right speaker it will be easier to get advice on an amp, etc.
I suggest that your best chance of putting together a system that you enjoy is to start over.
The speakers make the biggest difference in the sound of your system. I would listen to speakers at stores, audio shows or friend's houses until you hear a pair that you really like. Then get an amplifier that works well with your speakers. Then a cd player or other source that matches up with your amp.
That's the best advice I can give you. Once you get the right speaker it will be easier to get advice on an amp, etc.