Questions for Joseph Audio Pulsar (I or 2) owners about stands, and spikes/springs.

I am curious about whether any users have tried open-architecture designs, and if so, whether you heard any advantages. 

Assuming that most have used more traditional stands, I am interested in whether you have filled them and found that heavier is preferable, and particularly whether you prefer spikes or springs on the bases?

Thanks in advance for any feedback, as I am soon to receive my first pair!