What cam would you buy?

I can't figure out how so many people can run 3.91 or 4.10 or higher gears without an overdrive. To me, it makes ever taking my car onto a freeway just ridiculous and annoying. Everyone drives 80+ MPH on the freeway where I live, so I'm usually stuck in the slow lane tach-ing 4000 RPM. Can't hang with that.....maayyybe 3.55's.