I think you need to read more about where the games get the juice. THIS IS STILL TRUE:
"Our tests demonstrate fairly little difference between a $225 LGA 1155 Core i5-2500K and a $1000 LGA 2011 Core i7-3960X, even when three-way graphics card configurations are involved. It turns out that memory bandwidth and PCIe throughput don't hold back the performance of existing Sandy Bridge-based machines. "
There is a deep issue with laptop dual SLI setups. Can be twitchy, hot and if you ever try to load another Windows most folk melt down.
While the 17 and larger screen is nice for a desktop, I find students that buy such and regret it.
So I have the choice of 2 laptops, with the price being very similar.
It will be used for everyday stuff and gaming. Gaming will be done on the laptop itself and sometimes while plugged into a 65" 4K TV.
The first is a GT72 Pro445, relevant specs -
Intel Core i7-4980HQ
GTX980M 8GB DDR
The second being a GT80 Titan SLi-001 -
Intel Core i7-4720HQ
SLi GTX980M (8GB each)
In my opinion the Titan would be better, even with the weaker CPU and less RAM. From what I've read, the 4720HQ with sometimes out perform the 4980HQ, because of thermal throttling while in Turbo mode on the 4980HQ. Seems most systems dont really need more than 16GB RAM, and if I find I need more, its not a big deal to add 8GB in 5 minutes.
The biggest obvious advantage is the SLi GTX980M's. Most games support SLi at this point, and the small percentage that dont shouldnt be a big deal.