Which ones do folks like the best? Their site makes it pretty hard to differentiate between their products - seems like the big difference is the engine used and sometimes it comes with synth lines / drones.
Well - to be honest...they all sound cool, have good quality and are useful - but they also sound kind of the same - not in detail, but overall. I bought the Evolution: Atlantica, the Vikings: Cinematic Hybrid Punk Folk (not "much" viking in it) and the Aizerix Classic Trailer Toolkit. I like them all but they all have braams, risers, downer, impacts, swooshes, arps, some instruments like piano, basses, pads, drones, distorted things. They all would fit the next Transformers-Trailer
the A
izerx Classic Trailer Toolkit (and follow up products) is cool - its a six layer x/y-pad morphing tool. you can create your own trailer-sounds by combining different sounds and record the x-/y-movement for a lot of parameters. There is really a ton of useful material in it... (less distorted stuff if I remember right)
the
Vikings: Cinematic Hybrid Punk Folk got some more dark, distorted and gritty sounds like cello basses, low, mid and high cello textures, some warhorn braams, pulses and some male voice shoutings, etc. There is a lot of stuff to tweak the sounds.
the
Evolution Atlantica got cool brasses, pulses, pads, leads, etc. - its one of the oldest library from KF but not bad at all. Maybe its one of the cheapest right now and if you have no hybrid trailer stuff its a good way to start. And if you like the aestethic of KF sounds - get more
When the new Devistator was released I got interested but after I´ve heared some sounds I thought: "Mehhh...I have enough to work with from that already". Of course they sound a little more modern, heroic, etc. but I feel kind of bored.