I have a Hansgrohe faucet in my kitchen. Love it. I have Grohe fixtures in my recent bathroom remodel. Also great quality. Both seem to have good user reviews. You can't go wrong with either. I have no experience with Rohl.

I'd look at both Hansgrohe and Rohl for the fixtures that you like. Compare the prices. What does that tell you?

I have Hansgrohe throughout my house now (and some of the Hansgrohe designer brand Axor) I have been very pleased. Over the last 3 years I have changed everything out. I will link a site that reviews faucet product brands. They have a lot of other info to on remodeling that is interesting.

Here is a link that might be useful: faucet reviews & ratings part 2

We recently remodeled the kitchen and after looking at both Hansgrohe and Rohl went with Rohl only because we preferred the design. We love the faucet and will probably look at Rohl again as we redo the bathroom but they are both good brands. The link below was a tremendous help in making decisions.

Here is a link that might be useful: plumbing fixture reviews