Well, you asked what were the "best available" not "the cheapest available"
I really wouldn't recommend either of those cards you have listed as they are pretty much obsolete already in performance for most games of the past year with medium to low settings.
What is your top budget (and currency rate) as well as what games do you play?
I have a SiS computer, in the roughest conditions in my dads shop, it was all covered in dust about 1/8" thich, like disgusting, never cleaned in 8 years and still works. BTW it had a FoxConn mobo and HSF, no capacitator damage or anything. Anyone ever heard of socket 7? Lol.