I am a newbie here but read the posts here for some time and I really need lots of help. I have narrowed down to a new Yammy receiver but I am not sure which model can support my speakers. I currently use a 5 speaker setup to Prologic only and I have intentions to add a sub-woofer later on. The speakers I am using are Mirage(Canadian) M-290 (bookshelf) for the Front L&R, M-190 for the surrounds and MCC(Mirage center channel). I am looking at the RX-V450, 750, or the 1500 models for watching movies in Dolby Digital and DTS. I am scared that the 750 and 1500 are too powerful for my speakers but I am not sure at all as I am a non-techie. Will the 450 model be powerful enough to drive the speakers for 50% each for movies and audio? Regards.