Which is cheaper? Your going to see about the same performance from either one. Of course you will find others who will say one or the other rules, but they are generaly about the same...well, once you OC the GTO like the XT would be.
heh yeah, dx10 is too close for me to change cards now.
I'm building a 1080p projector which is gonna need some real power to drive in games but even that isnt enough to make me buy right now.
I'm not jumping on the DX10 bandwagon just yet. I'm waiting until it really matures and and all the intro cards are bug-free before I invest in one.
As for the GTO, I would be OC'd to GTX level. The XT would be OC'd to the XTX level. I'm not really looking to OC a whole lot, just enough to reach a high end level card.
The GTO goes for around 250, and the XT for a bout 280ish.