Well, you get the $200 off the base i5 so not really. Its $300 more. Worth it for gaming? There just aren't enough benchmarks!
The way I see it, if you were already ready to pay the $1700 for the i5, paying $1800 for the i7 seems like a no brainer. If you're just wanting to save more money, then yes, you can essentially get the i5 for $1500. I guess it comes down to what you're willing to pay. Brand new top of the line MBP for $1800 seems like a no brainer to me though. Especially if you plan on keeping it for a while.