I'm not sure most of this helps the guy who originally posted the question. I know that I don't understand completely the relationships between cyclone height, CFM, static pressure, etc. I do know that, by experience, if I have the space, I would always choose a standard cyclone for the best possible efficiency of collection.
Will the Lagun work for a non-production shop. Probably. The Oneida Dust Gorilla will most likely work also in the same scenario. Given that the machines from which dust will be collected are heavy duty dust/chip producers, I'd go for a more standard, stationary type cyclone. If space and electrical connections are issues, then the roll-around is a good option as long as only 1 machine is connected and being collected from at a time.
I would compare the stated HEPA filtration between the various collectors and manufacturers. I might be mistaken, but Oneida's HEPA filters filter a step above the standard HEPA specs. This might not seem like much, but it's that fine dust which is the real problem for health and the more of it that can be collected at the source, the better. Compare all the possibilities and some will drop out immediately as too expensive, won't fit in the shop, or aren't meant for exactly how you want to use it.
As I said, if you're only collecting from one machine at a time, like most of us who are part-time woodworkers, then the range of acceptable HEPA cyclone collectors increases significantly these days. I know some people appear to have had bad experiences with Oneida but I never have and I have found their equipment to be the best. I bought one of their first cyclones with an internal filter a couple of years after they started in business and it was amazing for its time. I recently upgraded to a V1500 and it is also amazing with much better filtration than my old one.
I do like the Laguna concept and the portability if that is what you are looking for.