Scott L,
Those EQ settings are basically the same as those I use with the PSR-3000--they work great using the L1 Standard, L1 Compact and a pair of Barbetta Sona 32SCs. The major difference is the Bose beats the Barbettas by a country mile when it comes to clarity and the ability to hear individual instruments.
Additionally, I performed a nite-club job this evening and I only used the Octave Piano on one song, didn't use the grand piano at all, used lots of guitar voices, growl sax, plus some custom voices I made for the sweet tenor sax. The entire job was performed with a PSR-3000 and a single Bose L1 compact. The dancefloor was packed to the limit, and everyone raved about the music.
As for Steve Demmings advice, not EVERYTHING Steve posts can be applied in the real world. After reading that post, which was quite some time ago, I tried it out--it didn't change a thing from an audience standpoint. Kinda' like the ongoing argument of mono V/S stereo that has been taking place on this forum since the first day I visited, which seem like about the same time that John Paul Jones joined the U.S. Navy.

Good luck on whatever you decide upon,
Gary
