Firstly, thanks to everyone for posting on my last thread. All the comments were very helpful. So I descided to come back and call on the experiance of the group. I have descided to go with the Radeon xfire route after much debate. I am considering the 1800xt 512MB that I found for $340 or a 1900xtx which I found for $400(no that is not a typo). This lead me to my first question. The 1800 is an ATI retail box and the 1900xtx is Power Color or Sapphire. Are these brands worthwhile, or should I stick with ATI or a premium brand like HIS? Should I just jump on the deal as the card stats are just that much better? The other question, and the main reason for writing this, is about crossfire. Can you have a secondary slave card of a different type? In that I mean can I have a 1900xtx in my main slot and a 1800xt in the secondary? Would the slower card bring down the main or just use it as a slave that boost preformance, memory, and takes advantage of games that have crossfire support? Lastly would mixing brands make a differance? Hope to hear what you all think and thanks in advance for posting.