Old Port Cove is deluxe. Palm Harbor downtown is too, do a comparison. Since its remodel, the Riviera muni marina is good and cheaper than the other two.
I'd also check out the Loggerhead in Palm Beach Gardens; nice thing about them is that if you have a lease at one, you get free transient reciprocal docking at all their others. We were at their Hollywood facility, which is very nice and secure, for a few months one year (near the FT.L airport, BTW) and made use of this privelege a few times.
"There's the Right Way, the Wrong Way, and what some guy says he's gotten away with"