I haven't tried the 326.98 yet, but I've run all the others. I still find the 320.18's to be the fastest and the smoothest. The IQ of other sets are better, especially the 326.80's, but I mostly play fps' and for me, framerate > all. After framerate comes driver smoothness to maintain accuracy. 320.18's are tops there too. I've read all the issues guys have had with them but haven't had a single one aside from BF3 artifacting which is easily cleared up flushing the texture cache. I'd rather smear butter across my monitor. Same blurry effects, better taste.