Stay with ProSites if
Stay with ProSites if your state dental association endorsement gets you a member rate. Sixteen state associations name them, and an association discount is real money that a general web shop cannot match with a lower list price alone. Ask your association what the member terms are before you compare anything.
Stay if you are a multi-location group that needs dental-specific plumbing — practice-management integrations, per-location page structures, and staff who already know how dental marketing rules work. A twelve-location practice buys a vendor with a support desk, not a single builder.