They are just cables after all... Why are HDMI cables so ridiculously expensive?
You can get a 3ft HDMI from Dollarama for $2 and a 6ft HDMI for $3. I'm using them now and I can't see any problems.
I also used to be able to get Optical cables from there for $1. I'm still using that one for my audio. Those are also ~ $15ish
while a "better" cable might theoretically work over a longer run where a "worse" cable doesn't, assuming both cables work (ie you get sound and picture) there will never be a difference between $5 and $500