Since I work on them and other computers on a daily basis, doing repairs, builds, custom mods, troubleshooting and various other software related work, for clients, and have owned laptops made by every major manufacturer, you could just say I know a shit ton. Heh.
I don't own THAT particular unit, nor have I worked on THAT particular unit, but I did a thorough background check on it and it passed with a good grade. The audio is shielded, which means it's much less likely to pick up any "voltage noise" from the rest of the system, like fan motors, capacitors and other hardware, which on an unshielded unit would transfer that sound to the audio circuits.
That i5 that comes with it is 2.8Ghz base clock, but it turbos to 3.4Ghz under loads, and while it's only a dual core i5, it has hyperthreading and is capable of four thread processing, which keeps it competitive. It also has a good GPU, so if you want to output to multiple sources or extended desktops, you can do that, for shows and such, in addition to your regular display on the desktop.
I've owned a DJ and Karaoke business, doing weddings, bars and private parties, for about ten years, and considering the units I've used, and still use, that have nowhere near this units ability, that work perfectly fine in all situations, you'll have no issues that I can see.