Please Recommend a Front End App

Newbie - please help me choose a direction.

I want to know what would be the best front-end app/language to use for
postgresql for exact form replication and ease of use.  PHP, Python,
Java, Rekall (the Kompany), other?  All suggestions welcome and appreciated.

Background-------------------
I am coming from Filemaker Pro 5.0 and Mac OS 10.2.8.

I am the newest of newbies to postgresql.  I just downloaded the
database today.  I have not started the database and do not even know if
I can run it on my computers.  I have a few old WinTel machines at home
but run mainly Macs at the office.

One important solution I created in Filemaker Pro requires very detailed
and exact replication of official court forms with database data entered
on the forms.  Imagine a form with small type, boxes and spacing that
must be exactly as on the official form and data from the database on
the form as printed to pdf.  One nice thing about Filemaker is that its
reporting ability is very flexible.

I also have an extensive solution with approx 50 tables/databases to run
my small business.  I built a calendar, contacts, clients, timelog, and
billing solution.  I have been bumping my head against Filemaker Pro's
50 database limit for years - server would allow you 125 databases for
about $1000.  For those of you with no experience with Filemaker, a
database is a table.  Each file only has one table and all
layouts/reports/forms and scripts are in the same file.  This setup has
pros and cons that are irrelevant now.

I am trying to migrate to linux and postgresql.  I love the MacOS but
they just upgraded to 10.4 (tiger) and made 3 of my iMacs obsolete
because they do not have on-board firewire so are not supported by
10.4.  Funny how Linux can be compiled to run on a 386 intel chip from a
floppy drive but MacOS cannot now run without firewire on a 4 year old
computer.

Filemaker.com created Filemaker Pro 7 which adds great features and
removes the 50 table limit - with a $1000 price tag for 3 units and a
5-simultaneous-user limit.  The upgrade to 7 may require extensive
changes to my solutions.  Now would be a natural time to change to a new
system since I have to relearn/change everything anyway.  Additionally,
I can only assume that I will be in for more of the same treatment as I
and people like me get our data more entrenched in their proprietary
business models.

Thanks for your help.