You are correct. EMT systems are less expensive most of the time. MI is the most expensive since you need all sorts of "extra" stuff. MC systems are next and EMT are the lowest. Always look at your installed costs since even some EMT systems will require some "extra" things like hangers and such. The only time MC is a better option is when you need sets. Switch to single conductor MC (free air rating) since you can probably reduce the sets needed. Otherwise EMT systems are the way to go. Lastly, always pick a manufacturer of a system who's made THAT system for a long time. That means they've tested at UL for years. If you have a project issue, those manufacturers can only advise based on thier testing results. So if you pick a system that's only been tested 10 times, good luck getting a solution to a problem you have (and you will). Most of thier solutions will add thousands at least to the cost. It's safer to pick a system that's been tested a ton since you'll have more options when problems come up. Cheaper doesn't usually work out in the end.
