Klipsch Pro Media 4.1 setup which I remember we used at a LAN party playing CS 1.6 in a school gym when my brother worked in the schools IT department. We used them in a 2.1 setup and left the back speakers at home. Even in 2.1 hooked to a projector, those speakers filled the whole gym...
Buy a new laptop through my work every few years (personal laptop that I pay them back for). Just recently picked up a MSI GE75 10SGS 222 Raider. Normally I go with an Asus ROG laptop (bought about 6 of those in the past), but they have become simply too expensive compared to the competition...