I ended up getting TC-Helicon Voice Tone Harmony G-XT. The quality of the vocal effects & harmonies is incredible. Nothing like the old Digitech I had. No robotic or grainy sounds.Even acapella it's great.I'm totally blown away!!!! Driving the guitar input using a separate track of acoustic guitar from the built in sound card works perfectly. I decided on this unit over the M because:
1. I have the flexibility of having the harmonies where & when I want 'cause I have to push the button.
2. I can turn down the outs from the Audigy card and blend the guitar input track with vocals including the effects and play an "acoustic" solo with just Bass, acoustic & vocals. This will add jobs for me.
3. A USB connection with and editor/librarian for creating/saving effects presets and for firmware updates.

This unit can be had at Same Day Music for $229 & free shipping.

John
ESI Gigaport HD+
Lenovo Turion II /4 Gig Ram/ Win7x64 be
15.6" Monitor
"The only Band is a Real Band"
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