Coming off a complete kitchen reconstruction a couple years ago, I can maybe offer a couple suggestions.
If you're doing the plumbing fresh, you can accomodate whatever location of the disposal you want- probably. The drain connection in the wall needs to be below the disposal drain. If you mount the disposal under the larger, deeper bowl, the drain connection will have to be pretty low.
I put in an Elkay SS sink- ELUH32211OL, a nice, 32"-wide double-bowl sink. After some careful shopping, I got it on the internet (Homeclick.com) for $500. The small bowl is 5-1/2" deep and the larger bowl is 10" deep. We didn't move the drain connection, so the disposal is in the smaller bowl, which is on the side away from the D/W. This gave more room to work out the drain connections.
Couple suggestions- though my sink has "heavy duty Sound GuardTM undercoating," running water into the big bowl produces a pretty drum-like vibration. I'm planning to find a sheet of 1/4" or so neoprene or some similar material and sticking it onto the bottom of the bowl with some gooey adhesive like roof-patching tar to dampen these vibrations better than the factory stuff does. That would be easier to do - if you think you might like it - before you put it in rather than later, when you will be working upside down. :rolleyes:
The other point is to INSIST your plumber uses ball valves for the cutoff valves, not only for the sink, but also for lavs, toilets, and any other plumbing fixtures you may be replacing. The usual, little chromy cutoff globe valves quit working after very few years because the washers detioriate and/or get crudded up with mineral deposits. They don't work any more, and to do any sort of work or repair, such as replacing the faucet washers, you have to shut off the whole water supply. This applies as well to valves farther back in your supply line: if you have to replace any valves in your supply lines, don't use gate valves, which also crud up and quit working after relatively few years; use ball valves, which almost never fail. These are available at any home or plumbing supply store.
If your plumber argues about this, it's because he wants to come back in just a few years and replace the globe/gate valves for you. :rolleyes:
My son was in the industrial valve business for ten years- I consulted quite a bit for his company and learned a fair amount about valves.
I'm on the Board of my Condo Association and I insist that ANY valve replacement be a ball valve. The place is 40 years old and, sure enough, most of the existing valves, when we come to do some maintenance/repair work - don't shut off. That means shutting down quite a few units to do some simple repairs.