What are the best Windows laptop/tablet hybrids?

Patrick is looking for a portable laptop/tablet hybrid with a screen big enough to work on. The Microsoft Surface Pro 3 fills the bill, but what about the cheaper alternatives?

I am looking for a portable laptop/tablet hybrid with a screen that is a reasonable size for working from home (larger than 10 inches), and fairly good performance, as my partner wants to edit photos. I know the Surface Pro 3 is probably the safest bet, but I have seen a few far cheaper alternatives. They seem to have mixed reviews, though, and every time I look, different models appear. Patrick