The main factor is the overall screen size and resolution, not the sunray model.
I have a 1g at my house with a single 24" LCD. Running over a cable modem (4-6mbps) with a cisco 831 provides very good performance. I've noticed that over a 10 minute perod, my average usage is around 70kbps. Thus a dual 24" setup would run around 140kbps as an average.
The key word here is average. I've seen my system burst up to the full pipe (4mbps) during times when i was performing things that required a lot of screen redraws (and performance suffered since I was maxing out my pipe) .
Also, if you think that sound is a good idea, note that it will add 2Mbps on top of the video bandwidth.
As a general rule, you can run dual 24" monitors over a fast (4Mbps+) broadband connection as long as your work load does not involve lots of full screen updates (spreasheets are good, watching movies is bad). If all you have is a 512kbps dsl line, I think that even a single 20" will prove to be frustrating at times (but still usable, depending on your definition of usable :-)
--john
The /opt/SUNWut/sbin/utcapture command will give you data about your environment as to # Packets, # Bytes, and more important, Latency of each SunRay connection.
To visualize what John is saying, think of the SunRay DTU's network connection as tunneling your Video cable.Two monitors=Two cables, Twice the resolution=twice the cable thickness.That is the beauty of the SunRay DTU , it doesn't have to be much smarter or complex than a monitor.
Mont