I've been using an Intuos Pro for years, and for my usual work (mostly layout in Photoshop and AI) it's fine, but I'm starting to use Painter more heavily and I find the disconnect between hand and image is more jarring so I'm biting the bullet and upgrading, but I'm struggling to narrow down my options. My first thought, naturally, was a Cintiq, but my budget only stretches to the 13HD. As it's pretty much an Intuos with a screen I figure that as an upgrade path it's the least painful, but as the Wacom name carries a premium I started hunting round for alternatives, of which there are a bewildering array.
Most of them (XP-Pen, Ugee, etc.) seem to be essentially the same product with a different badge, and the reviews I can find are not entirely helpful (mostly one-line Amazon reviews split evenly between "this is great" and "this is awful"), but the Huion KAMVAS GT-156HD looks like a decent bit of kit, and I did actually find an in depth review of it that seemed mostly positive; it's a similar kind of price to the Cintiq, but it has a larger screen and more buttons. (No tilt sensitivity, though.)
Further muddying the waters is that the Surface Pro 4 has just dropped in price bringing it pretty close to the same ballpark (at least for the base model), but for that you get a much higher resolution screen plus the benefit of it being a standalone device -- I don't very often take things on the road, but the fact that the Cintiq et al require mains power does make them slightly less convenient. I've had a quick play on one (although the only thing it had on to draw in was One Note) and the pen felt a little thin, and I'm not sure how it would perform under heavy use.
So, to my question: should I stick with what I know and go for the CIntiq, take a bit of a punt on the Huion, or throw caution to the wind and get a Surface?