also, it's my opinion that it's a good strategy to be very cost-conscience when buying amps for your surround speakers. if you only use your surrounds for movies, remember that they only do surround effects; for example, they are only going to give you the sensation of bullets flying by or planes flying across the soundstage, etc. thus, when i was in your position, i decided i did not want to spend big brand-name money on my surround amps. it just seemed like a waste to buy expensive amplification for the very occassional jet plane or other sound effects. if you plan to do surround music frequently, then that may warrant reconsideration.
and, finally, unless you have a really small room, i would always opt for more power than less, if your wallet can handle it. so, the rotel RMB-1075 at 125 wpc would not be one of my choices. in my opinion, it's not just volume you want when you buy separate amps, but also headroom for dynamic movie scenes. a more powerful amp is going to be more flexible in giving you a better, more surreal presentation of the soundtrack when it gets complex with big scenes, etc. jsut my opinion based on my experience with my amps, my speakers, my room, etc.. i have been very pleased with my 200 wpc amps.