Rotel RSX 1067, Arcam AVR350, Azur 640A Which one?

Newbie, I would like some 2 cent opinions.
This is what I have:
Klispch:
Rf15 2 x front 1'tweet 2 x 5.25' Tower 46 to 20khz
Rc25 center 1" tweet 2 x 5.25' 69 to 20khz
Rs35 4 x surround 2 x 1' tweet 1 x 6' 81 to 20khz
KSW 10" sub
Onkyo 602 85 watts x 7 no preouts
Room 16 x 12 x 8
Used for TV (Directv no HD ) and movies ( not HD ) some music
I was thinking of upgrading my receiver.Is it worth it with these speakers. Will I hear a difference?. All recievers listed on this site.