I would be interested to hear which of those KV's you guys would like the most.
The 1900kv is the slowest but also has the least power. Engineering really liked the 2280kv and 2850kv. We didn't really do much testing with the 3800kv because we assumed that wouldn't make it to market since we already have a 3800kv in the 1410.
Try to plan them around 2s, 3s, and 4s trucks. 1900kv/4s 2280kv/3s ????kv/2s?
You could do what other manufactures do and make 1-2 lower KV options but offer more for special order only.