haha those were the first version of the ultra psu's. seconf of all ANTEC doesn't. go do a search on any other forum and you will see that they have really bad quality conrol because they insist on using bad caps in their psu's.
anyone is good, but the X2 will be better when you start stress testing it. no voltage fluctuations at all. if your still kind of confused visit this thread
http://forums.anandtech.com/messageview.aspx?catid=27&threadid=1815673&enterthread=y
should teach you anything your wondering on psu's
the ultra would probably be the best stability wise. and force flex cables are easy to work with.
oh and snake eyes don't say antec makes superior psu's. they have really bad quality control and do not fix the problem
do you have extra money for it? if so then get one, you'll notice a large improvement. if you don't you'll think onboard is pretty good until you get a sound card =D
look on v-r zone, they have a bunch of articles to vmod different cards. should be pretty easy for your 6200 though. shade some transistors with a pencil or something. good luck