Seeking a better PL/pgSQL editor-debugger

Is a better PL/pgSQL editor / debugger than pgAdmin III or phpPgAdmin
available anywhere?

I ask because I was stuck for two days on the following error message:

ERROR: syntax error at or near "LOOP"

CONTEXT: compile of PL/pgSQL function "gen_history" near line 126

.and neither of those tools offered any more help than that. It turned out
the error was a missing ";" way back in line 53, and it took two days of
trial and error and staring at the code to find it. (On the positive side,
pgAdmin III's use of different colors to distinguish different program
elements [variables, keywords, string constants, comments] made the staring
part easier to do.)

I've learned that pgAdmin "syntax error" can mean anything from a missing
";" to a faulty block structure to an undeclared variable to. I don't know
what else, and as witness the example that error may be nowhere near the
line that is flagged. So I'm looking for a PL/pgSQL tool that would at
least provide more diagnostic error messages. Preferably, it would also
offer some sort of "breakpoint" function to let the developer see the values
of variables at specified points in the code.

I looked on the pgAdmin web site. The only place a PL/pgSQL debugger was
mentioned was on the "to do" page, under "major projects"
(http://www.pgadmin.org/development/todo.php), which I guess means don't
hold your breath.

As editors, the two pgAdmin tools apparently don't offer elementary
functions such as find and replace, which means I have to slurp my code out
into a text editor when I really need these things.

So I guess my questions are:

* Is it the case that the pgAdmin tools actually do offer these
features, but I just haven't found them yet? If so, can you show me where
they are?
* Are these functions available through add-ons to either pgAdmin
tool? If so, where can I get these add-ons?
* Are there other PL/pgSQL editors that provide these functions? If
so, what? Obviously, I'd prefer a free one, but would pay for one if
necessary.

~ TIA

~ Ken