I went with the smaller version but wish I had gone with the larger version as DH has a bad back and has to reach to use it.

Thanks for the suggestions. I was concerned that the 5500 would only work well with a farm sink (depth mostly) ...but after a bunch of measuring and your feedback - we realized the 5500 would be a better choice. We ordered a 5500 in Satin Nickel this morning. Thanks for your help!
-assad

I have some concerns too! I have a 35 inch farmhouse since and considering the 5500 but its on a peninsula. I want the extended reach but will it look to large on the counter. Going with an insta hot, soap dispenser and garbage disposal on the counter, any suggestions here?

Hi - following up on this string. Is the difference between the 5500 and the 5600 the reach? With the 5500 being bigger with an 18 inch reach?

You want your faucet to reach the entire sink space. It makes a difference depending upon your sink size.

5500 is the best designed faucet on the market with regard to ergonomics. It has a whopping 11" reach. What that means is, the dimension from the center of the base to the center of where the water drops is 11". Most faucets are centered and installed 2" behind the bowl. That means the water, with this faucet model, will drop water 9" into a bowl. Most faucets have the water dropping in the rear third of the bowl, causing the user to bend and reach to work under the water - which is uncomfortable and even painful for many users. The 5600 is a poor design. I worked with Waterstone years ago and offered a redesign for the 5600 - which is the 5610 angled faucet. The angle helps a bit, by allowing the water to drop slightly closer to the user, however, it is not nearly as comfortable to use as the 5500 model. The reach of the pullout is nowhere near as important as the reach in the home position. That being said, we have used the 5500 on 54" sinks with ease.This page has some videos and illustrations that might be helpful.