"My concern is that it Would be very annoying to not have enough room to wash your hands without them bumping the back of the sink." Well, it depends on the particular model. Some "regular size" faucets are smaller in scale than a prep sink faucet in a different model. You've probably noticed that, like many things, faucets have generally been "Supersized" in recent years. In any event, most "prep sink size" faucets are only a bit smaller that the "regular" size in the same model. Here's a picture of my prep sink size Ladylux in my main sink, which is 25 inches interior width. I have 6 inches of clearance between the back of the sink and the water flow, so bumping the back of the sink or faucet is not an issue at all. There is also more than sufficient spread even without using the pull down feature. Note that I also tested the "bar sink" size of the same faucet, and that one looked a bit small to me given the overall scale of the sink and kitchen. Sorry for the mid-construction pic, but I thought this showed the prep sink size faucet in context of the scale of the rest of the kitchen. Bottom line: pay close attention to the spec sheets of the faucet you're contemplating, and make sure the clearance from the back won't be an issue.

Install the faucet in one hole, a coordinating soap dispenser in the other hole, or a hot water dispenser or RO water dispenser, whatever dispenser is useful for your function of the sink. Drilling a third hole between the existing holes isn't going to work. With two appliances installed, the off center won't be noticeable because as a group they will be centered.

We need more information... Bar faucet or prep sink faucet? They're usually two different things. What type of faucet are you looking for for each location -- pulldown, pullout, standard fixed faucet? Here's one...Kohler Vinnata pulldown - full-size and prep sink-size Full size: http://www.us.kohler.com/us/Vinnata-single-hole-or-three-hole-kitchen-sink-faucet-with-pull-down-16-5-8-spout-and-lever-handle/productDetail/kitchen-sink-faucets/421475.htm Prep Sink size: http://www.us.kohler.com/us/Vinnata-single-hole-or-three-hole-kitchen-sink-faucet-with-pull-down-15-1-8-spout-and-lever-handle/productDetail/bar-sink-faucets/421601.htm Comparison of sizes (690 is the full size & 691 is the prep sink size) It also matches the Kohler Fairfax pullout (it's what I paired with the Kohler Vinnata in my Kitchen - the full-size Vinnata on the main/cleanup sink and the Fairfax on the prep sink) http://www.us.kohler.com/us/Fairfax-single-hole-or-three-hole-kitchen-sink-faucet-with-9-pullout-spout/productDetail/kitchen-sink-faucets/416100.htm Mine installed: Fairfax: Vinnata:

I ended up here, because I'm redoing my kitchen and trying to make a decision about the faucet. I have various faucets throughout my house from Kohler, Moen, Restoration Hardware, and Newport Brass. I think the Restoration Hardware fixtures are made by Newport Brass, because we had to call them when we needed to replace. We've had them from 10-12 years, so I don't know the styles or even if they are made. Almost all are polished nickel, and the Kohler and Moen are always spotless, laundry room and bathroom, respectively. I'm not crazy about the pull down sprayer on the Kohler. The Moen Showcase (do they still make this line?) is in the bathroom, and I love it so much, because I can just pour water over it and it will dry spotless. It's amazing. It is wall mount, and I wish I had it in every bathroom. Because of my success with Moen, when I needed a faucet for my kitchen, I bought an inexpensive (relative to all the other faucets I have) Moen at Home Depot. It is the only non polished nickel faucet I have. It is stainless steel, still looks brand new (10 years+), and the pull down sprayer works wonderfully. Unfortunately, I'd never buy fixtures from Restoration Hardware again. They spot like crazy. The Newport Brass are slightly better, but they also spot. I'm looking at Kohler and Moen for my new kitchen, but the choices are limited in polished nickel. Now I'll look at California Faucets, too, but I'll skip Rohl, since someone mentioned the polished nickel spots so much.