I replaced my Dell Inspiron 15 7548 a few months ago after some issues with the motherboard that Geek Squad couldn't resolve. I wanted a 7559, but since they weren't in stock I went with a Lenovo Y700. The speakers are amazing, and I haven't found anything to complain about yet. I've been running Fallout 4 on battery power with 30 fps settings, and performance drops only occur at 30% battery when the power saver comes on. I haven't tried running it at 60 fps with high graphics yet, but there's really no need to do that on a laptop.

I should let you know that I've been considering upgrading the 1TB HDD to the 1TB/8GB SSHD drive to make startup a little faster. The CPU hits .88 GHz at the most during startup and there's plenty of free ("wasted") RAM, but the HDD runs at full speed for a few minutes before everything is ready to go. It's not terrible, but it's definitely annoying considering the expectations it sets during normal use.