Single Stage or Base/Clear??

Did mine in a off brand base clear. looked great for the first year but not very hard easy to nick. now with 3 years on it the clear is starting to lift. Car is always garaged driven only once a month and the paint and prep were done at a prof shop. Morel of the story use the best pain you can afford and if you only have the $ for top quality single stage go with that before "bargan" quality base-clear.