The main problem that I see facing both cards is the technology they're based upon. Benchmark graphs also showed the relative performance of a GeForce 6800 GT 256MB card, which was often double or treble either midrange cards'. Cheaper derivatives of the NV40 design, vanilla GeForce 6800 and 6600 GT, as well as ATI's upcoming RADEON X700 XT, will begin to encroach on PCX5900 and X600 XT pricing territory. These newer cards are fundamentally better in almost every regard, so waiting a couple of months may be the prudent thing to do in the £150 graphics card category.