Yep, I'm running Netgear FA310TX's on all my machines right now. The only real difference with the pricier 3Com cards is that they process a lot of the networking instructions on it's own chip, independent from the CPU. This results in lower CPU utilization in comparison to lower priced cards. But considering the processing power (and memory management) that exists now, networking instructions hold almost 0 weight in the midst of programs like Photoshop, Lightwave, etc.
Any nic will do, really. I personally recommend (from experience) nics from DLink, Netgear, Linksys, SMC. Netgear is still my favourite amongst these, for their other networking hardware like switches, routers as well as nics.