Firewall software (Vista)

[Main Street]

Looks like I will have to switch from my best internet protection (not connected when using Vista), to something else which can monitor 2 way traffic.

I have only ever had to use "Little Snitch", a Mac users indespensible firewall friend. Everyone needs a good snitch.
Now I need some Firewall applic for Vista.
I don't want something which lands like a lorry load of silage tipped onto my OS and moves with the grace of an elephant.

After having a look through the minefield of  protection software available, I am considering to use Bit Defender internet security 2009 and just activate  (if I can) the firewall protection.
Then I am considering  ESET NOD32 AntiVirus security package
as well as Spyware.Doctor.with.Antivirus.6.0, and activating the bits that they say work best from those two.

Does anybody who has used these applications have anything bad to say about them or is there a suggestion to have a look at something else.