Disappointed by not able to take advantage of 1907FPc

I got two DELL 1907FPc monitor today, and was pretty excited at first because I found that the monitor supported swift to Portrait mode. But then I also found out that the graphic card of my machine (Radeon X1300/X1550) does not have a Windows Server 2003 driver that supports Rotating the screen. This gives me a huge incentive consider switching to Windows Vista just so that I can enjoy all the bells and whistles on my desktop. Think.......

By the way, installing the XP driver at this site doesn't really help anything at all. sigh and Sigh.