I'm thinking of upgrading my 3200g and currently choosing between buying the 4650g or the 5600g. The 5600g is $40 more expensive than the 4650g and that's a significant difference for me. I'm not really looking to play graphically intensive games right now and I plan on buying a discrete GPU in the near future. Is the $40 difference significant in terms of performance? Are there major disadvantages to using a 4650g? Your insights are highly appreciated!