I'm suprised you haven't gotten a thousand other replies already! 🙂
The KillerW 11N means your wireless adapter is the Killer series from qualcomm. This generally means that it gets better performance than the usual intel wireless modem, as well as better life. Not only that, but the killer series frequently has a QOS (Traffic controller thingy) that targets gaming, and sets gaming to a high priority over the majority of packets on your device. This in theory would mean higher pings. I believe BT4 means that Bluetooth 4 is just built into your Wireless Adapter, and the other letters I don't recognize...
Other hardware: IS this the top of the line? While there are "better" laptops in existance, this is the Asus top of the line and in many ways can surpass it's "better" counterparts. What makes asus standout to me? Cooling, by far, undeniably, the best cooling. The 880M is the highest end single GPU currently available, though, for about $4,000-6,000 you can get a Dell with two of them. The CPU is the I7 4700HQ, which is in the highest tier of I7's. The difference between it and the I7 4700MQ is that it has slightly better overall performance, but is stuck onto the Motherboard. The I7 4900 performs at 2.8GHz, whereas the I7 4700 performs at 2.4 Ghz. This isn't a big deal to most people, especially if this is only a gaming motherboard. For my uses, (Premiere pro, visual studio, photoshop, etc,) this clockrate is overkill already. That being said, the fantastic cooling that makes Asus standout, allows overclocking of the CPU to make it perform onpar, if not above the 4800, and almost at the level of the 4900. Back to GPU's, as I mentioned, this is the best mobile GPU available, and it performs better on an Asus than almost all other companies. Not only does Asus not have thermal throttling ever occur, it also allows overclocking on the GPU. So I would say this is certainly the top of the line, and theres really no reason to thing otherwise 🙂
Windows 7 vs 8: Windows 8 does have many differences that are hard to get used to, for example, the "metro UI". There are many new benefits it adds as well, like the many improvements made to performance overall. Many people have better luck in nearly all areas of Windows 8, especially in non-business related areas. If you can't live without the start button - and it's old functions, I would recommend an application like StartIsBack (My preferred) or Classic Shell (Free alternative). With these two modifications, you can get the speed improvements of windows 8, while keeping all your old and understandable design settings. I would also recommend upgrading to windows 8.1 as it fixes many of the under-the-hood issues immediately, as well as remedying some of the usual annoyances.
This is my first time with one of these post 😉 Best of luck!