TripAdvisor ranks Bay View House in 1st position (out of 103 entries) in the 'B&Bs/Inns' category. It's got 99 reviews, with the 'worst(?) 5 rating it as 'very good' and the remaining 94 rating it as 'excellent'. According to Google Maps, it's in walking distance of the ferry port:
http://www.tripadviso...h_Dorset_England.html
Harbour House (ranked 3rd in its class by TripAdvisor) is, unsurprisingly, also near to the harbour:
http://www.tripadviso...h_Dorset_England.html
Other highly-ranked establishments in the area include The Redcliff (ranked 12th but still with very good reviews):
http://www.tripadviso...h_Dorset_England.html
Aaron House (ranked 17th but with excellent reviews)
http://www.tripadviso...h_Dorset_England.html
and The Anchorage (ranked 20th but with consistently excellent reviews):
http://www.tripadviso...h_Dorset_England.html
Chris