A friend has had this faucet for a couple years, the 39", with no problems, I think she's pretty happy with it. Here is a link that might be useful: Ikea Hjuvik

I think you are right on. That is my experience after using both types. Also, the exposed spring seems like a place for gunk build up. They look cool though!

I assume pre-rinse comes from the stage in commercial dishwashing where you rinse off all the food before running it through the huge sterilizer. It requires a nice strong spray to jet everything off the plates. I was thinking to get one that extends beyond the sink because this is for my prep sink which is in my main prep area not far from the cookstove, and it could double as a potfiller at need. I could also get a regular pullout style, but am rather taken by the option of having both rinse head and regular faucet head on one stem.

Kraus KPF-1602 faucet! Installed for 2 years, and love it. It has two faucets in one, the water pressure is great, it has all-brass construction, and it is very dramatic looking. I cannot get over that some brands charge $1000+, and I don't even think those faucets are as functional as the Kraus. Right now, $285 at expressdecor (where we bought ours). Make sure to look at all the pics in the link below. Here is a link that might be useful: Kraus KPF-1602 faucet