To tell you the truth, I don't think that a cube should be "for Beginners" or "for the best of the best". Just buy a GuHong, get fast, and you're all set
buy it if you want. i got my first diy when i avg'ed 40 ish but it really make difference when you buy it. allso as a few people have said the guhong is still great without lube but ive always preffeerred my Av and Fii and curreently use lingyun which in my opinioon is better