Win 8 made the laptop I bought in Dec a brick.
In June after trying to get functionality out of Win 8 for 6 months without much success, I bought my first Apple product, an IPad. Microsoft made me an Apple customer.
Without a doubt go with Win 7.
You went from a laptop to a tablet. Apples and oranges. If you had gone from a laptop to a Win 8 tablet you would have never have been sucked over to dark side of overpriced underperforming Apple products. Someday the iPad may offer the same state of the art OS and hardware of the best of the Win 8 tablets. Until then it is an email reading, game playing toy, not a real work oriented computer.