My newest laser is an 80 Series GEO MAX. I bought it because I needed a faster spinning laser than the Topcon dual slope I already had for machine control. I thought initially it was a sales trick by the company selling the Smart Grade. I bought it and it was a great decision, excellent laser, does it all, and will spin faster than anything else in its price range that I could find. I also used to use an Apache stuck to the stick, works well, especially if you get the model that allows more latitude on the stick position so it doesn't have to be straight up and down.