I want to stream HD 1080p video to my media device and I have a 10/100 router now that gets transfer speeds of 9.2MB sec. Will this device get me the same transfer speeds and will it be stable enough for streaming video.
Your current set up with only getting 9.2 Mbps will not be enough to stream 1080p video. The problem with the electric system approach is you can have other items causing interference on the electrical lines which can take your download speeds away. Also being in an apartment complex could mean that different parts of your apartment are wired to other fuse boxes. Basically this means your two different outlets will not work because they can not talk to each other. Might want to double check with maintance on that just to be sure.
You could get a HT (n draft) wireless router and probably get better results (may cost a little more since you may need to also purchase a N drafter adpater). If you go this route please make sure to get one that is in the 5 GHz range. Most N draft routers also give you 10/100/1000 speeds.
The electric adapters work for some people and other not so much. It's a hit or miss from what I've seen. Kind of whats going on with your electric wiring and the equipment in use on the lines.