I have found that the bottom lip is tough - the guy on the seat is the biggest risk to its integrity. If you don't loan your machine or let the $12/hour help run it, it will last.
4-in-1 buckets, as they are heavier, also have less capacity. If you move a lot of light materials, like snow, you may want to get a second bucket for those materials. Moving 1 cubic yard at a time gets old pretty quick when the snow buckets are 2.5 cubic yards.