Okay....I hate to get totally political...but! Tis' the season. I promise not to get too preachy!
When you buy things made in China they are more likely than not, coming from cheap forced labor. Chinese laborers are forced to work, they aren't given an option. Many of them live in the factories. (there are plenty of resources on the internet that will verify this...or watch Walmart: The High Price of Low Cost.)
On top of that the materials used to manufacture various goods are not top quality. (think about how many times you heard about toys, etc being recalled because they were made with lead based paint etc over the last year.)
I would go with whatever is the cheapest brand at the grocery store. Also, I would imagine that if they are being shipped from China the shipping would be pretty high. If you have a washer and dryer at home you may want to try cloth diapers, I hear they are inexpensive (but can be a lot of work.)
Good Luck!
*I just read other responses and it sounds like coolababy diapers are cloth diapers....So! That being said....I would try any other cloth brand not made in China. Also, someone mentioned they come in bright colors....you don't want synthetic dyes like that on sensitive baby areas. Regular non-dyed cotton is probably best.