Recommendation for 1000BASE-SX card?

[no at spam at mgedv.net]

> ATM, we are using the onboard controller (Broadcom BCM5704C 
> wired to the

just a hint: be really careful of what kind of broadcom-chip
you'll get - some are could be not/bad supported by bge(4)/bce(4).
(check the archives/PRs on that).