I know a couple people who have had Santi E.Motion suits and several that have had an E. Lite (including me). The E. Motion fabric is just not durable enough. It's known for getting pinholes. The E. Lite fabric is pretty tough and I've been happy with my Santi. The one weak spot on mine is the boots. They started to wear around where there are velcro straps, and will eventually need to be replaced. For now, they have been successfully Aquasealed. The suit is 2.5 years old and has about 150-175 dives on it. My friends with Santi E Lite suits have been happy with them. They're just so darn expensive. And Santi customer service absolutely sucks. I actually have referred to the Santi as a Ferrari before.
I bought a 2nd drysuit a few months ago, a Seaskin trilam (Nova) and it seems to be made of tough material too. But, it has been plagued with a few leaks from both the P valve and dump valve, and it isn't as comfortable as the Santi (the suspender clips are poorly placed and dig into my hipbones, but I'm female and that may just be a "me" thing). Some of the stitching on the zipper cover started to fray/ unravel immediately, and the bungees inside the pockets (mine are the Expedition) also frayed immediately and had to all be replaced. The boots are thick and clunky - while they seem indestructible, they also trap air and limit ankle mobility somewhat. Overall I think the Seaskin will be a durable suit as the fabric seems tough, and I think I finally have the leaks fixed, but it definitely doesn't compare to the Santi (which retails for 3x as much). I thought the Seaskin would be my main suit and I'd move the Santi to a backup position but instead it's the other way around. I have 2 friends with Seaskin Novas that absolutely love them, though.
From what I have seen locally and heard, DUI is similar to Santi, with the FLX Extreme being the durable fabric and the TLS "tears like silk" being not durable enough. I know a number of folks with lots and lots and lots of dives on their DUI FLX.
I'm going to try to limp these 2 suits along for many years to come, as when one is being repaired I can now still dive the other. When it's time for a new suit, I'm not sure what I'll do. The premium suits are just SO expensive. And there's always so much other gear or classes to spend money on...