I find that the more wires you add the less sensitivity you get. I found this because it is just like add muffling to the reso head, I went from a tama 40 stand to a generic 20 on my Yamaha Brass 14x6.5 I had off a cheap snare and the drum sounded way better with the 20 stand. The same is to be said with tighter wires, the tighter the more resonance is lost resulting in a boxy tone. I suggest to everyone to sit behind the set and play with the wire tension while striking the drum, bring it way up and way down and you will see how much of a difference it makes.
As for puresound i like 'em they are made great, all the solders are filed smooth and the wires all seem to be equally taunt.
7 piece Pearl EXR