I think it just depends what you want to spend, and how much life you expect to get out of the stand. If you want it to last 5 years, I'd probably hold out for a solid wood or plywood stand. If your looking for something to last 2 years, you'll be fine with a particle board stand.
Obviously the best bet it to find a used one if you can, but sounds like you have a limited time frame. Is the new tank filled already? What's it sitting on now?