Do you have the headphones yet?
They are 5.1 so im sure they have great bass. All the 5.1's i've ever tried has great bass, sometimes too much it overflows the ears and blocks some of the other things i'd rather enjoy.
It would be a good headset for gaming. Since it comes with amplifier just find a sound card with good SNR preferably over 110db, and have it 5.1. Is this true 5.1? or just 5.1 effect?