Polk RM101 Any Good?

[CRMA]

I saw these at Newegg.com for $120 for the set of 4. I was thinking about a possible bedroom upgrade. I havent personally heard them, do they sound any good? Would I be better off going with a more heavy duty Monitor 40 or 50 for a fuller sound. Do these 101's sound "tinny or muddy?" Since they are so small I think that small speakers cant have a full sound. I hope that makes sense. I have a csi25 center channel and these 4 would be used as my monitors and surrounds. Remember this is for the bedroom not the main theater room. Any feedback would help. Thanks