I agree with the SF guys. I use SoundForge with the NR plug-in and have been able to save a lot of shots.
Also, using SoundForge with Vegas is a dream. You can cut your show as you like, then select a specific audio clip on the Vegas timeline, right click it with the mouse and choose open copy in SoundForge. SoundForge will launch with the clip open... do all your filters or whatever, save the clip and go back to Vegas, the new take will be waiting for you, in place!
You can create several takes based on the original clip and switch to the take you like with ease.