Pacific Coast - Central America Ports?
Here are some references you can check. Best you spend a bit of time researching your question in some of these, as ''best places'' depends on draft, season, type of facilities sought, etc.:
John Rains'' Miami to San Diego Guide
Latitude 38 back articles (www.latitude38.com) which covers this coast repeatedly
Carol(?) Rausch''s Guide to Western Caribbean
Calder''s similar guide (now outdated but little changes in Honduras-Guatemala)
Zydler''s Panama Guide
SSCA''s CD of last 8 years of Bulletins (small cost; huge amount of information; it''s searchable - www.ssca.org, go to the store and select ''Publications'')
A place like Blue Water Books will have (or will know about and can get) all the books on this list.