I'm looking to upgrade from Sound Forge and I'm looking at Wavelab...If I buy this program, would a program like CD architect be necessary, or would Wavelab cover the functions of CD architect?
you can burn directly from Wavelab. Just make sure your CD burner is supported by Wavelab.
I'm not quite sure if that's needed for Wavelab 6 since I use the 5 version but I needed to download some updates from Steinberg to make by CD-R work.