Before you drive yourself crazy with grounding straps, holding on to a ground wire and putting down different flooring, try the Zerostat as was recommended previously. Cheap, painless and relatively inexpensive.
The 1 1/2 revolutions on the vacuum cycle is not really enough to cause all the static problem you seem to have. The dry climate is probably a major factor. Are you using a regular compressor A/C system or an evaporative cooler? A swamp cooler might give you a a little moisture so you're not bone dry (and, therefore, not as much static) and is alot cheaper to run, too.
Regards
Jim