Drum rack and drum frame are two different things. Honestly I don't see any reason to buy drum frame. I does look good, but it seems to be hard to transport and it limits your setup possibilities a bit(in my opinion, of course )
The DrumFrame, invented by Bob Gatzen, allows many drummers to continue their playing careers despite severe back problems.
The DrumFrame was created to be completely ergonomically correct, saving pressure and pain on the spine, and thereby the legs and trunk as well. The kit mounts onto the DrumFrame and the whole thing tilts slightly back.
Drummers that use/have used the DrumFrame include Russ Miller, Dennis Chambers, Will Kennedy, Tony Royster Jr, Eddie Bayers, and more.