I'm a bit late to the party, but after reading the entire thread I was going to vote for the dual F25s, so I think you made the right choice. I've been a fan of servo subs for a long time...nothing I've heard matches the accuracy and "tight" sound of good sealed servo sub. Since this is a movie only system that might not matter as much, but it can't hurt. It takes some people a little time to get used to the servo sound...you'll hear the explosions and deep bass hits as a BOOM instead of a BOOOOOOM. (although you are coming from a high quality system, so that will probably be less of an issue for you). Congrats on the new subs, and be sure to post back with your impressions after you get them set up.