Doesn't look like anyone's asked this question in a couple years. 
I have an X-Surf 100 in my A2000 and love, love, love it. Yes, I'm using it with Miami DX but what can I say? It was super-easy to set up with the GUI (Roadshow, I'm looking at you with your no GUI), I can run it in startup to go online as soon as my computer boots, and I can easily click the icon to take it offline if I want to play WHDLoad games. Yeah yeah, I know it's slower than molasses in January, but it's easy to use. A lot easier than all these threads I see on "EasyNet" difficulties, haha.
So, what do you use?
Went with Roadshow. Tested Easynet, Genesis, and Miami. Roadshow was the fastest for sure especially for the X-surf 100. Roadshow is well supported, super easy to get going, and is pretty transparent. It was recently updated and yielded even faster results.
Some MNI drivers on Miami yielded decent speeds. The Ariandne (not the II) was my favorite card up until the X-Surf 100.
