694X's performance is actually not bad, it can easily manage better memory bandwidth than the 815E, but just a bit slower in 3D games. Overall the performance of the two chipsets are very close, I personally would not use performance as the deciding factor. VIA 694X boards tend to be cheaper, but not as widely available anymore as the 815E boards blossomed. The better chipset right now is definitely the i815E/EP B-step, since you get Tualatin support right away; the 694T is suppose to come out soon but there is no reason to wait, unless you need more than 512MB of RAM.