One of the major differences in the two keyboards is owners, including myself, try to make the 3000 sound like their 2000. It's a totally different keyboard, and as such, the tuning is quite different. This includes the EQ's for both the mic and overall keyboard settings. Additionally, the onboard speakers are significantly different, producing softer sounds than the 2000.
As for your PA system, try the Logitech Z-5500 and you'll be amazed at the difference. Those that have tried this system are using it to entertain audiences to 125 people and 99 percent had nothing but rave reviews.
An upgrade for your mic would not be a bad idea as well. The Samson Q7, Senheiser E-855, and the Shure 57A are all high-quality mics that work well through the keyboard are just through a PA or mixer.
I'll post my settings later today when I return home.
Cheers,
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.)