Zoomstorm are manufactured by PCnextday. See entries on this forum for all the manufactures you name as people have had problems with each of them. That said, there are hundereds of people who have no problem, but best be forewarned.
IMHO there is never a right time to buy technology. Most people are now offering a route to Vista if you buy a new PC now. The question is do you want Vista until it has been in themarket for a few months and the intial problems have been resolved? After Christmas may see some sales as demand drops in the post Christmas period, but there are some reasonable offers on now. Whenever you buy it will be out of date in a month anyway.
Good luck with your choice anyway.