New to openbsd

[bondpaper <bondpaper_(_at_)_earthlink_(_dot_)_net>]

Hello list members,

I'm a diehard linux fan, but having just done some research on the 
secure nature of openbsd, I'm in the process of configuring an openbsd 
box as a router/firewall. The first order of business it to locate a 
reasonably-priced multiport (4) ethernet card. I've located the adaptec 
cards, but they're about $450+. I've also seen mention of the D-Link 
DFE-570TX/DFE-580TX (much better price), along with some issues 
associated with how multicast is handled. Any recommendations on 4-port 
cards?

Another thing I've noticed is that some of the software versions seem to 
be a bit behind the mainstream. Take vi, for example - one of the most 
useful functions I found while using its Linux-based counterpart was the 
split function, which allowed for simultaneous editing of two or more 
documents. Unfortunately, this isn't supported in the standard vi that 
comes with the 3.2 packages. Can I simply download the vi source and 
compile it on openbsd, or would I be breaking the openbsd security model 
if I did this?

Finally, I notice that openbsd comes configured with IPv6 by default. I 
have yet to conduct any tests, but can a router/firewall with this 
configuration exist comfortably 'out of the box' in an environment where 
most of the traffic passing through will be IPv4?

Thanks,

Tom