Sun has not qualified ANY graphics options for that platform.
<a href="http://sunsolve.sun.com/handbook_pub/Systems/E2900/components.html" target="_blank"> http://sunsolve.sun.com/handbook_pub/Systems/E2900/component s.html</a>
There was no intent to directly attach a keyboard/mouse kit.
You would lose any and all console administrative function of the SC, as well.
If you need further guidance on this question, please open a service case with Sun, diretly.
Also ...
<a href="http://supportforum.sun.com/hardware/index.php?t=msg&th=5349" target="_blank"> http://supportforum.sun.com/hardware/index.php?t=msg&th= 5349</a>