Started out using stock spikes/cups on my VR-5s. I eventually moved to Outriggers, liked them, both visually and sonically. Mine came only with the spikes (or maybe I ordered them like that, cannot remember) but I don't stick them to wooden floor directly, instead I have the spikes sitting in Herbie's Audio Lab decoupling sliders which sound better to my ears than the spike floor protectors that came with my Outriggers. Once I put them in, I left them there and have not been inclined to change. An added advantage of the Herbie's, as the name suggests, is they allow for easier repositioning if needed without lifting the speaker or fearing a spike will gouge the floor if it slips out of the cup. I like them so much I also use them under a rack that also sits on the wooden floor. Herbie's argument, as you can read on his site, is that spiking direct to wooden floors allows floor vibrations to move back up to the speaker hence his recommendation to decouple. I don't know what the measurements show, but I've been happy with that decoupling approach. And at $16 a slider, they did not break the bank. I've used them for over 10 years now, happy enough not to worry further or feel the need to keep testing my reactions to the sound.