Samplitude /Sequoia is superior to Wavelab if you do anything other than 2 channel editing.
WL6 is great, dont own it but did play around with a ME friends copy. very nice interface, intuitive,,SRC is very nice.... Samplitude does >2g natively. Does DVD Audio natively, burns DDP discs/DVD-A/CD via its own burning engine...FFT, Oscillioscope, Spectragram,,,..POW-R 3 included.Edits in real time, no rendering necessary. Everything is done "virtually" not changing the original file until you choose to bounce..Very minmial CPU usage..the list goes on and on..
I got my version of Samplitude Pro V8 for 450 bucks. Brand new. Sequoia is a lot more expensive..