I have owned my current RTi series speakers since 2004, but I am looking into upgrading this year. The two sets of speakers that I am looking at are the newer RTi series or the LSiM series. I am about 75% movies and 25% music. What should I go with for my upgrade? I can get the RTi9's at tremendous savings, so would it be worth it to pay a lot more for the LSiM series? Thanks.