Speaker stands for B&W 804s

Currently, I run my B&W 804s on thick carpet, but the side to side stability is lacking, they tip easily, esp if I bump them slightly during vacuuming the carpet. They seem to be worse (stability wise) with the spikes installed, although these seem to be essential for good sonic performance.

So I was looking for a good speaker stand that would improve (or at least not degrade) the sound. I have it narrowed to two products; a Sound Anchors "T" type or the much more expensive Mapleshade type of Plynth.

With the Sound Anchors you bolt the speakers to them, so the stability is good, but I don't know about the sound.

With the Mapleshade 12x15 or 15x18 plynth, you place the 804 on top but they can still tip rather easily, unless you somehow can bolt them to the 2" or 4" thick maple board with the M6 screws (which requires considerable modification). Mapleshade recommends large brass footers be mounted to the speaker itself, before placement on the plynth, but I am not sure how stable this will be as it really does not widen the footprint of the speaker much over that with stock spikes. The large brass footers are also very expensive at between $100-150 each ($400-600 per speaker).

Has anyone had experience with either of these two stands and can give me some feedback?