Soldato
If its being bought for gaming, then for any long term lifespan, the graphics chip is the single most important component. The I7 laptop is a good all round spec no doubt, but its not the best for gaming, the 4570/4650/4670 are all a fair chunk weaker than the 4830, even the mobile version, the 4830 is about 25% faster.
yeah i do agree, its a shame there is no update option on the dell, as that would be a sweet machine