All you need is the integrated 10/100. Unless you have a particular need for the 1000, ("Gigabit Ethernet"), you don't need it, and you'll not really see it ever being in use. Most routers and hubs do not support 1000 (I think there's only one or two home products on the market that actually support that speed), 100/10 is the norm.

And, if you use any form of virus protection, then the simple act of copying files across a network will immediately compromise the gigibit speed advantage, because the AV protection will need to process each of the incoming files for problems, and the AV products don't do this nearly as fast as as 1000 (or even 100) Mb speeds.