Spikes or Spikeless

I have a concrete floor with vinyl flooring and a rug over it. My Gamut L5s come on a base with 4 large outrigger cones; they also have cups for the cones to rest in. My two friends and I have listened to them several times with and without the cones resting in the cups and everytime we decided that they sounded better with the cups. YMMV.

I've had good luck spiking , only time it made things worse was on a springy floor that seem to resinate . The spikes will not harm the carpet .

Mine is a tad different still. Just berber carpet glued to the concrete floor, no padding. My Paradigms need the spikes to sit solidly and they sound better with the spikes, no question. My Aerial 10t, with the Sound Anchor stands mind you, sound the same no matter if spikes are used or the heavy rubber feet. My horns are too big to care. In fact, the bass horns were designed to acoustically couple with the floor so they need to sit flat.

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Ended up using the extremely sharp spikes on the front 2 post of each speaker. While using a not so sharp on the 2 rear post.
The front drilled through to the concrete and the other 2 rear ended up not going so far....
Got them all balanced and they decoupled the speaker from the floor and prevented unwanted damping.
Really sweet sound.
Thanks for all the adavise....