I replaced my stainless steel sink about 6 months ago. I had one of the two bowl models, with one large bowl and one tiny bowl. The tiny one is supposed to be for the disposal, with the idea that you scrape off plates into there. However, my disposal was under the main bowl and the small bowl was just a useless waste of space. First, I usually just scrape off any plate material into the trash can, not the sink. And second, I want the disposal under the main bowl, as that is where I do prep work and wind up with vegetable peels, etc. With the disposal there, down they go!
So, I went with a Kohler Marsala cast iron model, which is one of the
2/3, 1/3 double bowl models. Additionally, it comes with a single hole faucet at the divider, and an optional second hole for either hot water dispenser, detergent dispenser, etc., in the extreme right corner. By only having two holes strategically placed, it allows the bowls to go back another couple inchs into what would be unused space at the back. It also has one very deep 2/3 bowl, and a less deep 1/3 bowl.
IMO, this sink is the ideal std size sink. You have a huge, deep bowl that can take just about any reasonable kitchen item. Being deep, it works extremely well with a spray faucet, allowing you to use the sprayer without blow back. I wasn't even thinking about this when I went with the deeper sink. But, what a difference. Previously, I had always used the sprayer gingerly, because water would easily blow back on you. And the 1/3 bowl, by virute of the fact that it goes way back, is big enough to be useful. It's excellent for placing a collander for example. And having it available as a backup is great. For example, you could have the main one dirty with dishs, scraps from prepping, etc, and suddenly you need to do something, like the collander, in a clean sink, so you have it waiting. The sink also has the drains moved near the back of the sink, where they should be, so that you have more useable space on the bottom of the sink closer to you. And by keeping smaller things to the front, there is less chance of them falling into the disposal than if the drain were in the center.
I also love switching from stainless to cast iron. The white makes the sink so much brighter and appealing to work over. It's even easier to see vegetables you may be working on against the white background, instead of the metal look. Plus, its quieter with the garbage disposal running.
Regarding the discussion of centering the sink in the window, also keep in mind that the faucet plays a visible role too. For example, if you can center the faucet in the window with a particular sink, or come close to center, then having the sink off an inch or so one way or the other may be fine. My sink is not centered, its over an inch to the left of center. With the Marsala being 2/3, 1/3, the faucet winds up right of center in the sink. So, with the sink to the left, the faucet to the right, the net result is the faucet is just a little to the right of center in the window and the whole thing looks great.
I'd get some templates of sinks that are available on the web and make some cardboard cutouts. That's what I did and it;s the best way to figure out how the whole thing will look against the window, etc, before buying it.