NAV 2009 with Hardware Firewall or straight NIS 2009 - Opinions?

Hi everyone:

 

Which would be best for a small network of three computers, one wired, two wireless draft-N ?

 

I am seeking ease of configuration and administration, reliability and speed.

 

Opinions would be greatly appreciated, since there are many options.

 

Thanks.

 

Plankton :0)