Trying to Understand rg-11 Coax cable

I'm going to be replacing my coax cable running from the street to my house about 100ft. I Currently have a Gigablast plan but Im no where close to gigabit advertised speeds. So I'm thinking about running RG-11 (Series11) cable ti minimise signal loss.I was going to bury the cable in grey conduite about 8'inch down, I do realize this might be overkill but that is they way I roll. My question is am I on the right track. Is there anything I'm doing wrong or should do different?