Best 6800GT PCIe comparison?

[Tetor]

Hi!

I currently have a Golden sample (overclocked) 6800GT card with 256MB DDR3
ram. Now I wonder if I was to trade up to PCIe system, what would be the
cheapest card with at least the same or slightly better performance I could
get?

Best Wishes

[Boozy]

I researched AGP + PCIe motherboards some time ago and I seem to remember
that there was a significant video performance compromise. Hopefully it's
no longer an issue, but you might want to check it out.