I play and program keyboards in theater orchestra pits for a living (along with my composing gigs). You might want to reconsider your choice of the U-220.
I'm very familiar with what you are going to need in that orchestra pit. Do yourself a favor and spend the money on a more recent unit like the XV-5050 or Fantom XR.
The Fantom XR would be ideal because of those six SRX expansion board slots. The Motif rack would be a good choice as well.
The U-220 is a ten+ year old box, as has been mentioned. It might have some cool sounds for the studio, for songs, that kind of thing. But for pit work, you need great sounds right away, you need a huge variety of sounds, you need the ability to add/swap expansion boards to cover the needs of different shows, and you need to *not* sound like you have old crap gear you bought used off eBay. Believe me, you'll sound dated with that box, and it won't give you half of what you'll need as far as sounds or making the kind of impression you want to on your employers.
There are guys and gals that *don't get hired* because they are still using Korg M1's or Alesis QSR's, or any number of outdated and inappropriate for the job type units. Not knocking the U-220, it's a good vintage digital synth, but it's not right for the job you need to do.
I get hired partly because of my playing and work ethic, but also partly because I bring great gear and keep up on what's out there. I spend the money on whatever I need to in order to have the right sounds (and great sounds) for the show. I don't like spending the dough, but it always ends up paying for itself. Most of the keyboard players I work with do the same thing. I also tend to end up being the official or unofficial "synth guru" on whatever shows I'm doing, and sometimes even get to spend the producers money on synths for their tours or productions.
If you exceed expectations on this gig the producers/director will have you back and/or have you work with them somewhere else. Take the long view as far as your gear budget and you will have a better chance of moving on to other paying jobs. Then there will be 9,999 guitarists with day jobs, and one busy full time musician!
