Scott,
I sincerely believe that if you A/B the TC and the Digitech VR through the same system, record them both using the same vocal arrangement, you probably will not be able to tell which is which by listening to them. That's a whole lot of money for something that may be marginally better and rarely used.
Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)