Hi,

Gaming PC Straight Away.
Don't look at the portability factor. You need a proper GPU and a Proper FPS. Real Gamer Doesn't wait for graphics conversion from CPU to GPU.
You Should opt for a Gaming PC. Stability matters.
I have a Gaming Laptop and a Gaming PC as well. My Laptop Graphics specs is much high than the PC. But my PCs performance is much much better than the Laptop.

The rest is up to you