FDMTo be honest I didn't use a tripod much so I just got a basic canon one I picked up on B and H for like $30.
In what regard does shooting on a better tripod do? I just never shot on a decent tripod
If you haven't even shot with a decent tripod I don't know if it makes sense for you to upgrade at this point. Invest in glass and stabilization if you really want better looking video, not a new camera. Look at Gavin Rudy's work, he shoots everything on a t3i, but he has put in a lot of hours to get to the quality of video he puts out. The 5D is versatile for timelapses and with the RAW video hack it can get amazing footage, but the FS is a real video camera with proper controls and inputs.