Floor Protection Discs


Good Morning Audiogon'ers!

Seeing if you could help me. I will be purchasing a pair of Target Audio HR70 monitor stands. Since they'll be going on a hardwood floor, I was also going to purchase Target Audio's 'Floor Protection Discs' to protect the floor. Is there a cheaper alternative -

https://www.dedicatedaudio.com/products/target-audio-spike-footers-floor-protection-discs-set-of-4


fuzzfriendly
It might cost more, but there might be a sonic advantage to using solid brass disks such as Star Sound Tcchnology Coupling Disc: http://www.starsoundtechnologies.com/productsDetail.php?APCD2-8
I would buy the Herbies gliders so you can easily reposition the speaker until you get it dialed in.  Not cheap, but very good. In fact, Jim Smith recommends them for sonic reasons in Get Better Sound.  
Thanks everyone your replies. It's tax return season, so I decided to bite bullet and purchase the Target Audio discs.