Mike,
Put your fingers on a PSR-2100 and you'll never look back. It's a great machine, has those built-in speakers, easy to navigate through the OS, does things that all the high-end boards do, and it performs those tasks quickly and effeciently. As a vocalist, you'll also appreciate the built in vocal processsor, which seems to have improved substantially over the one in the PSR-740. Right out of the box, no tuning or tinkering with voices or styles, the 2100 give you more bang for the buck than any other machine on the market.
Good Luck,
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.)