10/100/1000 vs 10/100 isn't really that big of a deal anyway.
Do you plan to hook your laptop up to a 10/100/1000 wired network?
If so, all the other "nodes" on the network support 10/100/1000 speeds as well?
Do you transfer lots of large (in the GBs) files between two computers a lot?
If the answer is no to any of those, then you really wont notice 10/100 vs 10/100/1000 differences.