The Hypertherm Powermax65 has a little more usable power than the Cutmaster82. The 82 is a 9 kw output machine, the Powermax65 is slightly over 9 kw. killowatts are calculated by multiplying the maximum design operating voltage of a plasma power supply x the maximum output amperage, and is the true indication of power that sent to the torch.
Since both systems provide about the same amount of cutting energy....then torch design and performance will make one system outperform the other. Hypertherm has always been the leader in torch designs....and you will notice that when new air plasma systems are introduced at Hypertherm...that they hav a torch that was designed to work with the Power supply.....as we discover new technology, it is designd into the system. The new Duramax torch has an innovative "Spring Electrode" design, as well as an energy booster known as conical flow, which provides for a higher energy density arc for faster cuts and squarer cut edges. Hypertherm will be the undisputed winner in regards to consumable life.
If you google search for both systems...you will find they are priced very similarly. If the two are within a couple of hundred bucks....choose the one with the best features and performance. Best way to figure that out is by asking on thes sites...and by test driving the machines.
What do you cut 80% of the time? What is your maximum pierce thickness? These are the things that should determine what system you need....maybe a Powermax45 is more than adequate, at a lower price!