Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
X850XT PE if you don't care much about the SM3.0/HDR features in FarCry / Splinter Cell or play Riddick, Doom3 (or plan to play games based on the engine) or flight sims (IL2, PF, LOMAC)
My opinion as a 6800GT owner at Ultra speeds. X850XT is the fastest by a slim margin without overclocking. The 6800GT/Ultra overclocks beautifully to beat most everything by the slimmest of margins. Yes, the 6800 does support some features that the X850XT do not, but that is a toss.
Buy whatever is cheaper and/or more available near you.