- Live Trees are Best
- Antiques are Next
- PE is Nice for New
- PVC is Common, not Good
Ikea offers nice, cheap PE trees if you're looking for an artificial tree that isn't made from PVC. Just don't put lights on it, because power cords are coated with PVC.
Oh, and aluminum trees are really pretty, if you have a bit more money and want to go with a used/antique option.