For the Amiga 2000 with zorro 2 slots an Xsurf is probably a good idea.. especially as you can add inexpensive IDE drives and Atapi Cd-roms to the system.
When I eventually finish building my A2000 this is the network card I plan to install
The Xsurf is currently for sale from local amiga dealers, a huge bonus!
It is rather expensive, only negative that can be remarked against this card :-)