And also be aware that old hardware(HD cards) will NOT work past PT 10.x HD. The current PT ULTIMATE will work with HDN and HDX cards(from Avid) as well as most any 3rd party hardware that connects via USB, Firewire and Thunderbolt. If you DO NOT own an HD/Native interface, or an HDX card(with attached interface), then you could save lots of money and go with the regular version of Pro Tools(in any case, you will be limited to 32 IO)
