I would think your QSC's would benefit most with this sub.

Just for curiosity,does the EA-7 have the D-BEAM?

It's just my guess, but the guess is that E-A7 can be a dissapointment comparing to SX900.

I know that I've never tried E-A7 personally. Watched videos. Also, I have Juno DS, which supposedly shares some of its sounds with E-A7. As for saxes, flutes, oboe, other orchestra sounds, I'd say, it looses even to PSR-3000 with some exceptions (some strings). The same is about guitars. Consider that SX900 is a fifth generation after PSR-3000, and all major sounds were updated a few times.

I see that in specific cases other factors can become more important, but so far I was not impressed with any of E-A7 videos, sometimes a term "General MIDI" comes to mind when I listen to its guitars or oboe (I have a special feeling to oboe).

But not everything can be judged by videos. I'm very curious about E-A7 myself, but in a situation when there's only one keyboard to have, I'd think 10 times before choosing it.

you prob could still usae the i5 and GK for the winery....

No.

Seven assignable buttons instead of D beam

Here is a song played and recorded with only the E-A7

http://francarango.homestead.com/MyRec_044.WAV

EA7 sounds good Fran! Is vocal through the kb?

Yes

Liked that..