HEXUS has posted a review on the SAPPHIRE RADEON X1800 XL 256MB & XFX GeForce 7800 GT 256MB

Both card packages offer compelling reasons for purchase and both are available immediately, but given a direct choice between the two, our money would slide over into XFX's corner for a number of reasons. Its GeForce 7800 GT is marginally faster in a sector where framerates matter hugely. It also runs quieter, and, should you wish and funds/hardware permitting, can be put to immediate SLI use. That's not to say that the SAPPHIRE X1800 XL is a bad card; it's patently not, and it outscores the XFX GeForce 7800 GT on the features front, but priced at £300 it steps just a little too close to GeForce 7800 GTX money. We hope that ATI and its partners can
release X1000-series CrossFire master cards in the very near future, as SAPPHIRE's card is just crying out to be run in multi-GPU mode.

SAPPHIRE RADEON X1800 XL 256MB & XFX GeForce 7800 GT 256MB Review