I have the older version of the t20, and am very happy with them. Bass is quite impressive considering the size of the drivers, but obviously you can't get a lot of bass from a small speaker/box. Overall I find they are very balanced, tour not going to break any windows with them but at reasonable volume levels I find the overall sound to be very good quality.
They ate a little bright sounding so you may want to turn the bass knob to least 75%. I run mine with the bass at 100% and the treble at the home position at 50%.
For gaming you can get more volume by dialing the bass down a bit to prevent distortion, but to be fair, if they are next to your monitor, on a desk, you probably won't need too.