Definetly worth it . I went from Rotel to Classe and in my experience the difference was huge.
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The Rotel is sufficeint for you center and surrounds (I have the RMB-1095 for my HTM2D and DS8S surrounds) but not you 802Ds that require much more power to sound their best.
I have 803Ds and a RB-1090 that I'm selling as it isn't enough for the B&W's at lower listening volumes and it puts out 380 watts/channel.
The best I've heard the 802Ds sound were with Classe 400 momo blocks (expensive). I'm going to use a Spectron Musician III SE for my 803Ds and the RMB-1095 for the rest.
An whatever model, the Classe is clearly the better amp over Rotel and slighlty warmer which probably is a good thing with the bit forward 802D/803D mains.