The 8MB version does not suck. I've never been able to tell the difference in performance level between an 8 and 12MB. I have an 8, my brother has a 12. Maybe a benchmark could tell you there's a difference, but it's still probably slight at best.
Also, from what I've seen, there's no difference in price between the 8 and 12MB versions anymore. I haven't even seen an 8MB version in months. And if you're going to buy a 3dfx product, why not go ahead and buy the Voodoo3??? The V3-2000 is about the same price as a Voodoo2 anyway and offers about the same performance as 2 V2's in SLI.
Make it idiot proof and someone will make a better idiot