Hello, I've inherited a MacPro 1 with an ATI Radeon x1900. Unfortunately, I get horizontal lines when I open any window. From what I've gather from searching the interweb, it seems to be a driver problem with Leopard 10.5. ATI's site does not have a current driver. So, rather than wait for ATI to get off it's but, I thought I'd just get a replacement. Can anyone suggest a comparable replacement that won't break the bank? (I am using 2 monitors). Any help is appreciated. Thanks in advance.