You are right. There are a ton of cheap stocker sets out there right now. I have wanted new rims since I bought my rhino, but told myself that I would wait until I needed new tires first, and then upgrade all at once.
I have 1500 miles on my stock tires and they are pretty worn. They aren't bald by any means, but I am at that point where I am concerned with punctures. Also, both rims on the passenger side are jacked up from when my wife laid the rhino over. They both still hold air, but they are ugly!!