The forth item. And until you run benchmarks the 4670 should beat the 4650 by a smidge. The ATI vs. Nvidia may find one outperforming the other depending on the game used in the benchmark. So it may come down to whether you want Ford or Chevy (uh, ATI or Nvidia) for the graphics.

Bob

PS. Remember that laptops are not the best idea for game platforms. Shorter lifespans, no battery life, etc.