technically, yeah you could run 150WRMS since they each would be splitting the wattage but seriously I doubt you'll need it. Quality > Quantity. Thus why I recommend Denon, Onkyo, Harman Kardon, Marantz, etc.
If you want more around there, get a Pioneer receiver. They typically put out around 120WRMS @ 8ohms. But in a dorm, 50W is plenty. I got a ton of complaints when I got my little stereo here (two 3" pioneer speakers each off ~100W).
My "home theater" consists of JBL L1 (Fronts..oldddd but amazing), Infinity Entra center, Infinity Entra sub, and some in ceiling rears (forgot brand) all running off a Pioneer Elite 5disc DVD changer and Pioneer reciever. The JBLs are getting ~100WRMS and believe me, they are PLENTLY loud.
My dorm setup is a Pioneer home theater in a box deal...DVD player and reciever plus 4 matching satelites and center. I'm only using two of the satelites as fronts (no space in here for all) and a JBL Venue 12 sub. The little Pioneer's don't sound great but they get loud easily off the 100WRMS. I'd like some real shelf speakers (JBL/Infinity, Paradigm, or something like that) but it's all money money money... Just something to think about...
http://www.jr.com/pioneer/pe/PIO_VSX818V/