Got the Sun Ultra 20 M2 for nearly 2 monthes, but I only have one monitor at home, today I went to buy a new monitor in Tuen Mun finally.
The new monitor is ViewSonic VA703b, costs $1490, a bit expensive but as I buy in Tuen Mun, saved some traffic and afford, so it is still OK for me.
But once connected, the screen has some problem, looks like the display has shifted to right and down a bit, after some debugging, it is due to a cheap VGA cable which comes with the switch box I previously used.
Now everything is working. But I use my old HP pavilion f50 on Sun box while using the new monitor on my old machine, why? Because the new monitor doesn't have DVI input. :)