Hi there, I had a Volar (44 USD-ebay)on mine for like 2 weeks. Had to be adjusted twice within that period. I switched it to a D.I.D. ,which cost me more than double, but absolutely worth it. Staying away from Volar in the future.
Theres really no such thing as a good cheap chain. Unless you buy new second hand off Ebay etc..
Buy the best you can afford and new sprockets. They all wear together so replace them together.. It will save you heaps in the long run. Oh and look after that chain with very regular oiling.. or get a Scott Oiler it will do it for you. They are brilliant