Which option should i take for getting internet on an upper floor?

Hey there. Earlier i made a thread (http://www.tomshardware.com/forum/38000-42-building-internet) about getting internet on the second floor of my house for a desktop (online) gaming PC. I need help deciding between the options. My options are:
-Get a wireless adapter for the PC
-Use macbook running windows 7 to share internet to PC through a crossover cable (slow?)
-Use powerline adapters (house is 115 years old...this option seams iffy)
-Run a cat6 ethernet cable along the floor/ceiling through a room, then up through the ceiling, into the "computer room." (Could i get Comcast [or anyone] to do this for me?)

Thanks a ton in advance. Let me know if i left out any huge options that i happened to miss!

I prefer running Ethernet cables when I can hide them, but the powerline adapters should be a decent option. I HOPE your power cables are not 115 years old

I don't think they would help with running the cabling unless it was to get a cable tv connection to the room. I don't have exp with Comcast directly, but that's how TWC works.

I definitely agree that running the cable is your best option though. I've got about an 8 year old home, and do use the powerline adapters which work great, but that's only for a dvr to pull down show listings. I would not want to trust it for gaming.

The cable company will most likely run the cable on the outside of your house and drill a hole in the nearest window frame instead of drilling holes in your walls and floors and trying to fish the cable through the walls.

Ok. Think they'll drill a hole in a window frame on the second floor of the house? Also, how do i contact them? I cant seam to figure out how to set up an appointment via phone.......

I don't have exp with Comcast directly, but that's how TWC works.

You can always get shielded and direct bury cable from amazon. Think 100 feet was about $90 with shorter lengths available