For future development, both for our young core and Omri individually, I'd prefer him to start the rest of the year. With our capspace heading into next summer, now is the time to try to figure out if we can groom Omri into our future starting sf, or if we should go after a bigger name sf this summer. Make the wrong decision, and you waste the future potential of Omri.
Cisco is important to this team, but IMO more as a veteran presence than a player on the court. Sure we could start him, and maybe win an extra few games, but we're not that much better with him starting, and given he doesn't mean much to our future young core, I'd rather find out sooner than later what we have with Omri.
If it looks like he'll be better as a 6th man down the road, then go get the best sf we can this summer. However, if you do that, you need to be damn sure Omri won't be starting material in a year or two, which I personally think he will be. Now is the time to try an figure it out. We already know what Cisco can bring, but we have yet to see what Omri can do as a starter if given a chance to start 30 consecutive games. I can say fairly confidently Omri has improved every month of the season, and as he picks up steam and confidence, which is vital for young players, why throw a roadblock in the way?