Right thinking it's time for a upgrade. Is crossfire really worth it? Thinking about getting either one x1900xt maybe x not sure yet. or two x1800xtx in crossfire. You can get a x1900xtx for about £380 and you can get 2 x1800xtx for about £450. See I'm thinking if I get x1900xt or xtx I could always add another x1900xtx later. not sure what to do. any opions?