I've used the Ariadne, Ariadne 2, A4066, and DENEB (with a Linksys USB 200M) the last few years. I'd recommend the Ariadne WRT the Zorro cards. If I already had a DENEB, I would say the 200M works great here, really no need to buy anything else. Here's a quick
tcpspeed run between my A2000/060 and PC, with a wireless AP and router in the middle. CPU use was measured with Executive. (Miami is my preference for the Ariadne, but it doesn't work too well here with the DENEB - hence the lack of results.)
MiamiDX
Ariadne Send: 883 kB/s, 95% CPU
Ariadne Recv: 739 kB/s, 70% CPU
Genesis:
Ariadne Send: 826 kB/s, 80% CPU
Ariadne Recv: 817 kB/s, 75% CPU
DENEB Send: 926 kB/s, 90% CPU
DENEB Recv: 777 kB/s, 70% CPU