I am considering an amp upgrade but am not sure what to do. I currently have a Rotel RMB1075 (120w x 5). I have a 5.1 system with no plans to go to 7.1. All of my speakers are 2 ways with the internal crossover on each at 3Khz. Here is the question. Should I add a second 1075 and bi-amp all 5 speakers or go with a new 1095 (200w x 5) and sell the 1075? What are the advantages of bi-amping with 2 1075s verses a single 1095 to drive everything? Is the 1095 a better built unit than the 1075?