In-wall ethernet cable for streamer

I am running Cat5e (non-shielded) cable inside the wall which I installed myself when my home was being built before they drywalled. It was a bulk box of Cat5e that I ran to multiple rooms. I am running this from the router on the first floor to the room in the basement where my system is for my streamer.
I was thinking I could easily pull new cable through with maybe one drywall repair area in a closet.
1) is it worth the hassle to go to something higher and shielded like a Cat 6 or 7?
2) I do not see anyone selling Cat6 or 7 shielded by the foot? I only need 50' and all I see are bulk rolls of 1000'
Thanks!