Hello,
I got my Xp4 from here http://www.cbwnet.com/default.php?cPath=56&sort=2a&&page=2&osCsid=b75e67a26e35f747d4bb9ed934c52783.
It's only $99 so even if it's close to the gf4's benchmarks by about 80%, it's still a good buy since it's about 1/3 the cost of of it.
I mean let's look...