You can certainly ask here, but I think you'd do better to contact a couple of the companies you're considering and ask them for local references. Go SEE the work and TALK to the homeowners.
ALSO - do NOT choose a landscaper to build your pond. DO NOT. Instead, choose a POND EXPERT to build your pond landscape your yard. Almost EVERY landscaper out there will nod "yes" if you ask if they know how to build a pond - incredibly doubtful that it's true. If you are a pondbuilder, you will advertise yourself as such. But EVERY SINGLE pondbuilder will also know how to landscape an entire yard, no problem. If you can build a beautiful pond, you can landscape.
If you need help finding qualified pond builders, hop on Aquascape's website and search for CACs in your area. They are the cream of the crop.
One last word to the wise - be prepared to be stunned at what this will cost you. For reference, take a look at some of Greg Wittstock's YouTube videos. Some of the more recent ones he has started putting a price tag on what the builds cost. It ain't cheap.