I have the SR-18 and I love it very much. However, anytime I play loud with lots of action, I can tell that it is struggling to produce clean sound. I have been trying the MA 700 but again it doesn't sound as MUSICAL as the amp insdie the SR-18. I just borrowed the Sunfire Grand Cinema Signature amp at 400watts x 5 channels from a local dealer to have a week home audition but this monster is too powerful and the sound is clean but I feel like I have a headache because the sound is so seperate and a bit harsh. Does anyone know of any amplifier which sounds identical or as MUSICAL as the Marantz amp which is powerful 200 or 250 watts per channel? I would appreciate for all the help.