Here's a post that I put in today, it might be an interesting read..........

Man! Am I happy! After reading all of the posts, I decided to go out
and buy an antenna and try to mount it in the attic. I went to Radio Shack and picked up a VU-120XR roof mount antenna for 50 bucks. I also picked up a rotator ($69.99)and a 5ft metal mast. ($8) (Just in case I needed them)
Even though I have a large attic, the antenna was still fairly large (In hindsight I probably should have gotten their smaller roof/attic antenna for 30 bucks, but Oh well...) I found out that the mast was too long (5ft) so I temporarily mounted it to a paint roller stick. After some limited cursing and fitting the antenna between the rafters, (took about 2 hours) I was able to run some RG6(100ft) down from the attic, through the house and to the basement where my Mits. WS-65611 is located.
I connected the cable to the Ant-DTV input (intergrated HD tuner) and had the TV run it's channel memory program. After about 10 - 12 min., stand back, what do you know, Im getting CBS, NBC, ABC, WGN, PAX, WCIU and a couple of other spanish stations I hav'nt even seen before.
Im pretty sure that im getting the HD signal from the main stations because the TV displays how the broadcasts are being shown (HD Standard, HD 16:9, 4:3 Standard, etc.) I turned on WGN-News and I swear, I could see the pimples in Allison Payne's face. Plus, I believe that I saw something that said that NBC broadcasts "Law & Order: Special Victims Unit" in HD, saw that last night and it looked fantastic.
I couldnt sit there and go through all the channels because I had to get up and go to work Saturday, but when I get home, Im going to permanently secure that antenna in the attic and check the channels again when I return. (Im taking the Rotator back because It looks like I dont need it, (can't turn that big thing around in the attic anyway) and I'll use a hack saw to cut the mast down a little.)
So, to all you folks that posted your threads on antennas, it looks like you were right. Thanks for all of your imput, it really helped me a lot.
(Now if I can see if NBC will be showing one of the NBA Finals games in HD, that will make this all the better!)
Once again, Thanks for all you help.
