Smoke wise: Not necessarily new and not necessarily fast, but I grew Hortilab's sour amnesia about 2 years back, and to this day I still think it's the strongest flower I've ever smoked. 2nd place cup winner from the netherlands. I have hardly seen anyone grow it though, so there are probably tons of phenos to be found, and I don't know which I had. I'm guessing no one grows it due to the fact that it has a 75+ day flower time for an average yield. They have great genetics over there though, and I'm looking forward to see what they have in store for the future.
In terms of bag appeal: I would have to say Sweet Thai. Got it as a freebie. Didn't smoke as good as the sour amnesia, and it stretched quite a bit, but it looked amazing after curing. Extreme light green almost golden, covered in trichomes with an amazing skunk smell mixed with some type of exotic spice smell that I couldn't place. I really wish I would have kept pics... Could have just been the pheno, but it looked better than any picture I've ever seen of it.
Will probably run at least one of these again in the future if I find the space. They are just not good strains to run if you're going for efficiency.
edit: genetics of Sour Amnesia are (Sour Diesel x original Holland Amnesia cut)
Sweet Thai (Super Thai x early skunk)