Recommendable Windows firewall with NAT sought

[Sven Riedel <sr () gimp org>]

Hi,
I'm more of a linux person and know my way around it pretty well. But
now I'm looking for good firewalling software for windows, which
incorporates NAT, just like iptables under linux. 
If the quality is good, I'd favour GPL/free-beer software over payware
(I guess my linux-years spoilt me ;)). Also, I'd like to hear of
firewalls which you wouldn't recommend (and the reason why - this isn't
a troll, nor am I trying to start a flamewar, I just don't know my way
around windows security software that well yet).

Regs,
Sven
-- 
Sven Riedel                      sr () gimp org
Liebigstr. 38 
30163 Hannover                  "Python is merely Perl for those who
                                 prefer Pascal to C" (anon)

---------------------------------------------------------------------------
----------------------------------------------------------------------------