[CentOS] PCI ethernet card for CentOS

I need to get a second ethernet card for my HP Proliant CentOS server,
to attach a LinkSys WRT54GL router to.

I see that there are many Realtek RTL8169S gigabit cards
going for a song on eBay.
Is anyone using one of these under CentOS?
Do they work OK?
(I used to have a couple of Realtek cards - not gigabit -
and they worked fine.)

Or does anyone have a strong recommendation for other cards?
Any advice or suggestions gratefully received.

-- 
Timothy Murphy  
e-mail: gayleard /at/ eircom.net
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland